Finding the Fourth Proportional to 12,490.52, 18,726.53 and 5,909.00

Step by Step Solution

1. Step 1: Write the proportion equation
   12,490.52 : 18,726.53 = 5,909.00 : x
2. Step 2: Convert to fraction form
   12,490.52/18,726.53 = 5,909.00/x
3. Step 3: Cross multiply
   12,490.52x = 18,726.53 × 5,909.00
4. Step 4: Simplify right side
   12,490.52x = 110,654,942.59
5. Step 5: Solve for x
   x = 110,654,942.59/12,490.52
6. Step 6: Final answer
   x = 8,859.12