Finding the Fourth Proportional to 42,218.52, 63,318.31 and 12,632.56

Step by Step Solution

1. Step 1: Write the proportion equation
   42,218.52 : 63,318.31 = 12,632.56 : x
2. Step 2: Convert to fraction form
   42,218.52/63,318.31 = 12,632.56/x
3. Step 3: Cross multiply
   42,218.52x = 63,318.31 × 12,632.56
4. Step 4: Simplify right side
   42,218.52x = 799,872,160.30
5. Step 5: Solve for x
   x = 799,872,160.30/42,218.52
6. Step 6: Final answer
   x = 18,946.00