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Finding the Fourth Proportional to 1,939.57, 2,676.90 and 1,277.78

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Solution

The fourth proportional to 1,939.57, 2,676.90 and 1,277.78 is: 1,763.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,939.57 : 2,676.90 = 1,277.78 : x
  2. Step 2: Convert to fraction form
    1,939.57/2,676.90 = 1,277.78/x
  3. Step 3: Cross multiply
    1,939.57x = 2,676.90 × 1,277.78
  4. Step 4: Simplify right side
    1,939.57x = 3,420,489.28
  5. Step 5: Solve for x
    x = 3,420,489.28/1,939.57
  6. Step 6: Final answer
    x = 1,763.53

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