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Finding the Fourth Proportional to 427,686.87, 640,252.13 and 258,695.79

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Solution

The fourth proportional to 427,686.87, 640,252.13 and 258,695.79 is: 387,270.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    427,686.87 : 640,252.13 = 258,695.79 : x
  2. Step 2: Convert to fraction form
    427,686.87/640,252.13 = 258,695.79/x
  3. Step 3: Cross multiply
    427,686.87x = 640,252.13 × 258,695.79
  4. Step 4: Simplify right side
    427,686.87x = 165,630,529,276.05
  5. Step 5: Solve for x
    x = 165,630,529,276.05/427,686.87
  6. Step 6: Final answer
    x = 387,270.55

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