Finding the Fourth Proportional to 31,726.20, 43,781 and 18,298.02

Step by Step Solution

1. Step 1: Write the proportion equation
   31,726.20 : 43,781 = 18,298.02 : x
2. Step 2: Convert to fraction form
   31,726.20/43,781 = 18,298.02/x
3. Step 3: Cross multiply
   31,726.20x = 43,781 × 18,298.02
4. Step 4: Simplify right side
   31,726.20x = 801,105,613.62
5. Step 5: Solve for x
   x = 801,105,613.62/31,726.20
6. Step 6: Final answer
   x = 25,250.60