Finding the Fourth Proportional to 72,011.73, 99,375.33 and 39,746.59

Step by Step Solution

1. Step 1: Write the proportion equation
   72,011.73 : 99,375.33 = 39,746.59 : x
2. Step 2: Convert to fraction form
   72,011.73/99,375.33 = 39,746.59/x
3. Step 3: Cross multiply
   72,011.73x = 99,375.33 × 39,746.59
4. Step 4: Simplify right side
   72,011.73x = 3,949,830,497.62
5. Step 5: Solve for x
   x = 3,949,830,497.62/72,011.73
6. Step 6: Final answer
   x = 54,849.82