Finding the Fourth Proportional to 31,025.23, 42,814.78 and 16,878.04

Step by Step Solution

1. Step 1: Write the proportion equation
   31,025.23 : 42,814.78 = 16,878.04 : x
2. Step 2: Convert to fraction form
   31,025.23/42,814.78 = 16,878.04/x
3. Step 3: Cross multiply
   31,025.23x = 42,814.78 × 16,878.04
4. Step 4: Simplify right side
   31,025.23x = 722,629,569.43
5. Step 5: Solve for x
   x = 722,629,569.43/31,025.23
6. Step 6: Final answer
   x = 23,291.67