Finding the Fourth Proportional to 31,025.67, 42,815.29 and 16,878.82

Step by Step Solution

1. Step 1: Write the proportion equation
   31,025.67 : 42,815.29 = 16,878.82 : x
2. Step 2: Convert to fraction form
   31,025.67/42,815.29 = 16,878.82/x
3. Step 3: Cross multiply
   31,025.67x = 42,815.29 × 16,878.82
4. Step 4: Simplify right side
   31,025.67x = 722,671,274.69
5. Step 5: Solve for x
   x = 722,671,274.69/31,025.67
6. Step 6: Final answer
   x = 23,292.69