Finding the Fourth Proportional to 109,287.68, 150,841.56 and 71,540

Step by Step Solution

1. Step 1: Write the proportion equation
   109,287.68 : 150,841.56 = 71,540 : x
2. Step 2: Convert to fraction form
   109,287.68/150,841.56 = 71,540/x
3. Step 3: Cross multiply
   109,287.68x = 150,841.56 × 71,540
4. Step 4: Simplify right side
   109,287.68x = 10,791,205,202.40
5. Step 5: Solve for x
   x = 10,791,205,202.40/109,287.68
6. Step 6: Final answer
   x = 98,741.28