Finding the Fourth Proportional to 72,115.98, 99,443.61 and 49,487.97

Step by Step Solution

1. Step 1: Write the proportion equation
   72,115.98 : 99,443.61 = 49,487.97 : x
2. Step 2: Convert to fraction form
   72,115.98/99,443.61 = 49,487.97/x
3. Step 3: Cross multiply
   72,115.98x = 99,443.61 × 49,487.97
4. Step 4: Simplify right side
   72,115.98x = 4,921,262,388.37
5. Step 5: Solve for x
   x = 4,921,262,388.37/72,115.98
6. Step 6: Final answer
   x = 68,240.94