Finding the Fourth Proportional to 72,272.57, 99,717.23 and 41,638.17

Step by Step Solution

1. Step 1: Write the proportion equation
   72,272.57 : 99,717.23 = 41,638.17 : x
2. Step 2: Convert to fraction form
   72,272.57/99,717.23 = 41,638.17/x
3. Step 3: Cross multiply
   72,272.57x = 99,717.23 × 41,638.17
4. Step 4: Simplify right side
   72,272.57x = 4,152,043,078.76
5. Step 5: Solve for x
   x = 4,152,043,078.76/72,272.57
6. Step 6: Final answer
   x = 57,449.78