Finding the Fourth Proportional to 31,025.34, 42,815.07 and 16,878.18

Step by Step Solution

1. Step 1: Write the proportion equation
   31,025.34 : 42,815.07 = 16,878.18 : x
2. Step 2: Convert to fraction form
   31,025.34/42,815.07 = 16,878.18/x
3. Step 3: Cross multiply
   31,025.34x = 42,815.07 × 16,878.18
4. Step 4: Simplify right side
   31,025.34x = 722,640,458.17
5. Step 5: Solve for x
   x = 722,640,458.17/31,025.34
6. Step 6: Final answer
   x = 23,291.94