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Finding the Fourth Proportional to 409,262.60, 613,990.26 and 128,779.76

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Solution

The fourth proportional to 409,262.60, 613,990.26 and 128,779.76 is: 193,199.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    409,262.60 : 613,990.26 = 128,779.76 : x
  2. Step 2: Convert to fraction form
    409,262.60/613,990.26 = 128,779.76/x
  3. Step 3: Cross multiply
    409,262.60x = 613,990.26 × 128,779.76
  4. Step 4: Simplify right side
    409,262.60x = 79,069,518,325.14
  5. Step 5: Solve for x
    x = 79,069,518,325.14/409,262.60
  6. Step 6: Final answer
    x = 193,199.96

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