Finding the Fourth Proportional to 31,023.61, 42,811.34 and 16,876.15

Step by Step Solution

1. Step 1: Write the proportion equation
   31,023.61 : 42,811.34 = 16,876.15 : x
2. Step 2: Convert to fraction form
   31,023.61/42,811.34 = 16,876.15/x
3. Step 3: Cross multiply
   31,023.61x = 42,811.34 × 16,876.15
4. Step 4: Simplify right side
   31,023.61x = 722,490,404.13
5. Step 5: Solve for x
   x = 722,490,404.13/31,023.61
6. Step 6: Final answer
   x = 23,288.41