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Finding the Fourth Proportional to 3,109.78, 4,286.04 and 2,766.25

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Solution

The fourth proportional to 3,109.78, 4,286.04 and 2,766.25 is: 3,812.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,109.78 : 4,286.04 = 2,766.25 : x
  2. Step 2: Convert to fraction form
    3,109.78/4,286.04 = 2,766.25/x
  3. Step 3: Cross multiply
    3,109.78x = 4,286.04 × 2,766.25
  4. Step 4: Simplify right side
    3,109.78x = 11,856,258.15
  5. Step 5: Solve for x
    x = 11,856,258.15/3,109.78
  6. Step 6: Final answer
    x = 3,812.57

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