Finding the Fourth Proportional to 31,072.15, 42,879.54 and 16,925.01

Step by Step Solution

1. Step 1: Write the proportion equation
   31,072.15 : 42,879.54 = 16,925.01 : x
2. Step 2: Convert to fraction form
   31,072.15/42,879.54 = 16,925.01/x
3. Step 3: Cross multiply
   31,072.15x = 42,879.54 × 16,925.01
4. Step 4: Simplify right side
   31,072.15x = 725,736,643.30
5. Step 5: Solve for x
   x = 725,736,643.30/31,072.15
6. Step 6: Final answer
   x = 23,356.50