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Finding the Fourth Proportional to 3,978.47, 5,490.18 and 2,210.03

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Solution

The fourth proportional to 3,978.47, 5,490.18 and 2,210.03 is: 3,049.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,978.47 : 5,490.18 = 2,210.03 : x
  2. Step 2: Convert to fraction form
    3,978.47/5,490.18 = 2,210.03/x
  3. Step 3: Cross multiply
    3,978.47x = 5,490.18 × 2,210.03
  4. Step 4: Simplify right side
    3,978.47x = 12,133,462.51
  5. Step 5: Solve for x
    x = 12,133,462.51/3,978.47
  6. Step 6: Final answer
    x = 3,049.78

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