Finding the Fourth Proportional to 72,257.76, 99,721.61 and 41,640.38

Step by Step Solution

1. Step 1: Write the proportion equation
   72,257.76 : 99,721.61 = 41,640.38 : x
2. Step 2: Convert to fraction form
   72,257.76/99,721.61 = 41,640.38/x
3. Step 3: Cross multiply
   72,257.76x = 99,721.61 × 41,640.38
4. Step 4: Simplify right side
   72,257.76x = 4,152,445,734.61
5. Step 5: Solve for x
   x = 4,152,445,734.61/72,257.76
6. Step 6: Final answer
   x = 57,467.13