Finding the Fourth Proportional to 31,072.72, 42,879.04 and 16,925.68

Step by Step Solution

1. Step 1: Write the proportion equation
   31,072.72 : 42,879.04 = 16,925.68 : x
2. Step 2: Convert to fraction form
   31,072.72/42,879.04 = 16,925.68/x
3. Step 3: Cross multiply
   31,072.72x = 42,879.04 × 16,925.68
4. Step 4: Simplify right side
   31,072.72x = 725,756,909.75
5. Step 5: Solve for x
   x = 725,756,909.75/31,072.72
6. Step 6: Final answer
   x = 23,356.72