Finding the Fourth Proportional to 150,152.78, 207,285.90 and 86,478.32

Step by Step Solution

1. Step 1: Write the proportion equation
   150,152.78 : 207,285.90 = 86,478.32 : x
2. Step 2: Convert to fraction form
   150,152.78/207,285.90 = 86,478.32/x
3. Step 3: Cross multiply
   150,152.78x = 207,285.90 × 86,478.32
4. Step 4: Simplify right side
   150,152.78x = 17,925,736,391.69
5. Step 5: Solve for x
   x = 17,925,736,391.69/150,152.78
6. Step 6: Final answer
   x = 119,383.31