Finding the Fourth Proportional to 72,456.72, 99,990.27 and 40,625.61

Step by Step Solution

1. Step 1: Write the proportion equation
   72,456.72 : 99,990.27 = 40,625.61 : x
2. Step 2: Convert to fraction form
   72,456.72/99,990.27 = 40,625.61/x
3. Step 3: Cross multiply
   72,456.72x = 99,990.27 × 40,625.61
4. Step 4: Simplify right side
   72,456.72x = 4,062,165,712.81
5. Step 5: Solve for x
   x = 4,062,165,712.81/72,456.72
6. Step 6: Final answer
   x = 56,063.34