Finding the Fourth Proportional to 108,870, 150,229.08 and 61,128.72

Step by Step Solution

1. Step 1: Write the proportion equation
   108,870 : 150,229.08 = 61,128.72 : x
2. Step 2: Convert to fraction form
   108,870/150,229.08 = 61,128.72/x
3. Step 3: Cross multiply
   108,870x = 150,229.08 × 61,128.72
4. Step 4: Simplify right side
   108,870x = 9,183,311,367.18
5. Step 5: Solve for x
   x = 9,183,311,367.18/108,870
6. Step 6: Final answer
   x = 84,351.17