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Finding the Fourth Proportional to 3,869.40, 5,803.54 and 1,237.20

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Solution

The fourth proportional to 3,869.40, 5,803.54 and 1,237.20 is: 1,855.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,869.40 : 5,803.54 = 1,237.20 : x
  2. Step 2: Convert to fraction form
    3,869.40/5,803.54 = 1,237.20/x
  3. Step 3: Cross multiply
    3,869.40x = 5,803.54 × 1,237.20
  4. Step 4: Simplify right side
    3,869.40x = 7,180,139.69
  5. Step 5: Solve for x
    x = 7,180,139.69/3,869.40
  6. Step 6: Final answer
    x = 1,855.62

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