Finding the Fourth Proportional to 99,185.76, 149,460.48 and 82,039.68

Step by Step Solution

1. Step 1: Write the proportion equation
   99,185.76 : 149,460.48 = 82,039.68 : x
2. Step 2: Convert to fraction form
   99,185.76/149,460.48 = 82,039.68/x
3. Step 3: Cross multiply
   99,185.76x = 149,460.48 × 82,039.68
4. Step 4: Simplify right side
   99,185.76x = 12,261,689,951.85
5. Step 5: Solve for x
   x = 12,261,689,951.85/99,185.76
6. Step 6: Final answer
   x = 123,623.49