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Finding the Fourth Proportional to 205,045.30, 307,475.67 and 86,655.70

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Solution

The fourth proportional to 205,045.30, 307,475.67 and 86,655.70 is: 129,944.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    205,045.30 : 307,475.67 = 86,655.70 : x
  2. Step 2: Convert to fraction form
    205,045.30/307,475.67 = 86,655.70/x
  3. Step 3: Cross multiply
    205,045.30x = 307,475.67 × 86,655.70
  4. Step 4: Simplify right side
    205,045.30x = 26,644,519,416.82
  5. Step 5: Solve for x
    x = 26,644,519,416.82/205,045.30
  6. Step 6: Final answer
    x = 129,944.55

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