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Finding the Fourth Proportional to 579,740.80, 869,654.40 and 205,715.20

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Solution

The fourth proportional to 579,740.80, 869,654.40 and 205,715.20 is: 308,588.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    579,740.80 : 869,654.40 = 205,715.20 : x
  2. Step 2: Convert to fraction form
    579,740.80/869,654.40 = 205,715.20/x
  3. Step 3: Cross multiply
    579,740.80x = 869,654.40 × 205,715.20
  4. Step 4: Simplify right side
    579,740.80x = 178,901,128,826.88
  5. Step 5: Solve for x
    x = 178,901,128,826.88/579,740.80
  6. Step 6: Final answer
    x = 308,588.13

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