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Finding the Fourth Proportional to 256,682.34, 385,358.85 and 206,108.37

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Solution

The fourth proportional to 256,682.34, 385,358.85 and 206,108.37 is: 309,431.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    256,682.34 : 385,358.85 = 206,108.37 : x
  2. Step 2: Convert to fraction form
    256,682.34/385,358.85 = 206,108.37/x
  3. Step 3: Cross multiply
    256,682.34x = 385,358.85 × 206,108.37
  4. Step 4: Simplify right side
    256,682.34x = 79,425,684,438.57
  5. Step 5: Solve for x
    x = 79,425,684,438.57/256,682.34
  6. Step 6: Final answer
    x = 309,431.82

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