Finding the Fourth Proportional to 31,042.32, 42,838.38 and 16,895.28

Step by Step Solution

1. Step 1: Write the proportion equation
   31,042.32 : 42,838.38 = 16,895.28 : x
2. Step 2: Convert to fraction form
   31,042.32/42,838.38 = 16,895.28/x
3. Step 3: Cross multiply
   31,042.32x = 42,838.38 × 16,895.28
4. Step 4: Simplify right side
   31,042.32x = 723,766,424.85
5. Step 5: Solve for x
   x = 723,766,424.85/31,042.32
6. Step 6: Final answer
   x = 23,315.47