Finding the Fourth Proportional to 72,119.82, 99,520.98 and 39,853.71

Step by Step Solution

1. Step 1: Write the proportion equation
   72,119.82 : 99,520.98 = 39,853.71 : x
2. Step 2: Convert to fraction form
   72,119.82/99,520.98 = 39,853.71/x
3. Step 3: Cross multiply
   72,119.82x = 99,520.98 × 39,853.71
4. Step 4: Simplify right side
   72,119.82x = 3,966,280,275.84
5. Step 5: Solve for x
   x = 3,966,280,275.84/72,119.82
6. Step 6: Final answer
   x = 54,995.70