Finding the Fourth Proportional to 31,021.43, 42,808.32 and 16,874.28

Step by Step Solution

1. Step 1: Write the proportion equation
   31,021.43 : 42,808.32 = 16,874.28 : x
2. Step 2: Convert to fraction form
   31,021.43/42,808.32 = 16,874.28/x
3. Step 3: Cross multiply
   31,021.43x = 42,808.32 × 16,874.28
4. Step 4: Simplify right side
   31,021.43x = 722,359,578.01
5. Step 5: Solve for x
   x = 722,359,578.01/31,021.43
6. Step 6: Final answer
   x = 23,285.83