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Finding the Fourth Proportional to 8,678.22, 11,974.59 and 5,140.86

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Solution

The fourth proportional to 8,678.22, 11,974.59 and 5,140.86 is: 7,093.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,678.22 : 11,974.59 = 5,140.86 : x
  2. Step 2: Convert to fraction form
    8,678.22/11,974.59 = 5,140.86/x
  3. Step 3: Cross multiply
    8,678.22x = 11,974.59 × 5,140.86
  4. Step 4: Simplify right side
    8,678.22x = 61,559,690.75
  5. Step 5: Solve for x
    x = 61,559,690.75/8,678.22
  6. Step 6: Final answer
    x = 7,093.58

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