Finding the Fourth Proportional to 150,061.40, 207,102.60 and 86,411.60

Step by Step Solution

1. Step 1: Write the proportion equation
   150,061.40 : 207,102.60 = 86,411.60 : x
2. Step 2: Convert to fraction form
   150,061.40/207,102.60 = 86,411.60/x
3. Step 3: Cross multiply
   150,061.40x = 207,102.60 × 86,411.60
4. Step 4: Simplify right side
   150,061.40x = 17,896,067,030.16
5. Step 5: Solve for x
   x = 17,896,067,030.16/150,061.40
6. Step 6: Final answer
   x = 119,258.30