Finding the Fourth Proportional to 108,902.25, 163,200.15 and 86,616.72

Step by Step Solution

1. Step 1: Write the proportion equation
   108,902.25 : 163,200.15 = 86,616.72 : x
2. Step 2: Convert to fraction form
   108,902.25/163,200.15 = 86,616.72/x
3. Step 3: Cross multiply
   108,902.25x = 163,200.15 × 86,616.72
4. Step 4: Simplify right side
   108,902.25x = 14,135,861,696.51
5. Step 5: Solve for x
   x = 14,135,861,696.51/108,902.25
6. Step 6: Final answer
   x = 129,803.21