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Finding the Fourth Proportional to 266,779,919.70, 400,169,879.55 and 221,430,287.70

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Solution

The fourth proportional to 266,779,919.70, 400,169,879.55 and 221,430,287.70 is: 332,145,431.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    266,779,919.70 : 400,169,879.55 = 221,430,287.70 : x
  2. Step 2: Convert to fraction form
    266,779,919.70/400,169,879.55 = 221,430,287.70/x
  3. Step 3: Cross multiply
    266,779,919.70x = 400,169,879.55 × 221,430,287.70
  4. Step 4: Simplify right side
    266,779,919.70x = 88,609,731,557,630,848
  5. Step 5: Solve for x
    x = 88,609,731,557,630,848/266,779,919.70
  6. Step 6: Final answer
    x = 332,145,431.55

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