Finding the Fourth Proportional to 31,002.07, 42,781.04 and 16,854.79

Step by Step Solution

1. Step 1: Write the proportion equation
   31,002.07 : 42,781.04 = 16,854.79 : x
2. Step 2: Convert to fraction form
   31,002.07/42,781.04 = 16,854.79/x
3. Step 3: Cross multiply
   31,002.07x = 42,781.04 × 16,854.79
4. Step 4: Simplify right side
   31,002.07x = 721,065,445.18
5. Step 5: Solve for x
   x = 721,065,445.18/31,002.07
6. Step 6: Final answer
   x = 23,258.62