Finding the Fourth Proportional to 150,478.72, 207,660 and 83,410.72

Step by Step Solution

1. Step 1: Write the proportion equation
   150,478.72 : 207,660 = 83,410.72 : x
2. Step 2: Convert to fraction form
   150,478.72/207,660 = 83,410.72/x
3. Step 3: Cross multiply
   150,478.72x = 207,660 × 83,410.72
4. Step 4: Simplify right side
   150,478.72x = 17,321,070,115.20
5. Step 5: Solve for x
   x = 17,321,070,115.20/150,478.72
6. Step 6: Final answer
   x = 115,106.44