Finding the Fourth Proportional to 31,729.20, 43,785.72 and 18,301.02

Step by Step Solution

1. Step 1: Write the proportion equation
   31,729.20 : 43,785.72 = 18,301.02 : x
2. Step 2: Convert to fraction form
   31,729.20/43,785.72 = 18,301.02/x
3. Step 3: Cross multiply
   31,729.20x = 43,785.72 × 18,301.02
4. Step 4: Simplify right side
   31,729.20x = 801,323,337.43
5. Step 5: Solve for x
   x = 801,323,337.43/31,729.20
6. Step 6: Final answer
   x = 25,255.08