Finding the Fourth Proportional to 31,689.86, 43,736.62 and 18,258.52

Step by Step Solution

1. Step 1: Write the proportion equation
   31,689.86 : 43,736.62 = 18,258.52 : x
2. Step 2: Convert to fraction form
   31,689.86/43,736.62 = 18,258.52/x
3. Step 3: Cross multiply
   31,689.86x = 43,736.62 × 18,258.52
4. Step 4: Simplify right side
   31,689.86x = 798,565,951.00
5. Step 5: Solve for x
   x = 798,565,951.00/31,689.86
6. Step 6: Final answer
   x = 25,199.42