Finding the Fourth Proportional to 31,042.68, 42,837.76 and 16,895.20

Step by Step Solution

1. Step 1: Write the proportion equation
   31,042.68 : 42,837.76 = 16,895.20 : x
2. Step 2: Convert to fraction form
   31,042.68/42,837.76 = 16,895.20/x
3. Step 3: Cross multiply
   31,042.68x = 42,837.76 × 16,895.20
4. Step 4: Simplify right side
   31,042.68x = 723,752,522.75
5. Step 5: Solve for x
   x = 723,752,522.75/31,042.68
6. Step 6: Final answer
   x = 23,314.76