Finding the Fourth Proportional to 98,981.12, 136,415.46 and 72,081.02

Step by Step Solution

1. Step 1: Write the proportion equation
   98,981.12 : 136,415.46 = 72,081.02 : x
2. Step 2: Convert to fraction form
   98,981.12/136,415.46 = 72,081.02/x
3. Step 3: Cross multiply
   98,981.12x = 136,415.46 × 72,081.02
4. Step 4: Simplify right side
   98,981.12x = 9,832,965,500.57
5. Step 5: Solve for x
   x = 9,832,965,500.57/98,981.12
6. Step 6: Final answer
   x = 99,341.83