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Finding the Fourth Proportional to 296,937.60, 445,438.80 and 287,606.40

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Solution

The fourth proportional to 296,937.60, 445,438.80 and 287,606.40 is: 431,440.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    296,937.60 : 445,438.80 = 287,606.40 : x
  2. Step 2: Convert to fraction form
    296,937.60/445,438.80 = 287,606.40/x
  3. Step 3: Cross multiply
    296,937.60x = 445,438.80 × 287,606.40
  4. Step 4: Simplify right side
    296,937.60x = 128,111,049,688.32
  5. Step 5: Solve for x
    x = 128,111,049,688.32/296,937.60
  6. Step 6: Final answer
    x = 431,440.98

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