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Finding the Fourth Proportional to 389,932.68, 538,121.37 and 215,504.40

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Solution

The fourth proportional to 389,932.68, 538,121.37 and 215,504.40 is: 297,403.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,932.68 : 538,121.37 = 215,504.40 : x
  2. Step 2: Convert to fraction form
    389,932.68/538,121.37 = 215,504.40/x
  3. Step 3: Cross multiply
    389,932.68x = 538,121.37 × 215,504.40
  4. Step 4: Simplify right side
    389,932.68x = 115,967,522,768.19
  5. Step 5: Solve for x
    x = 115,967,522,768.19/389,932.68
  6. Step 6: Final answer
    x = 297,403.96

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