Finding the Fourth Proportional to 150,426.72, 207,597.60 and 86,767.20

Step by Step Solution

1. Step 1: Write the proportion equation
   150,426.72 : 207,597.60 = 86,767.20 : x
2. Step 2: Convert to fraction form
   150,426.72/207,597.60 = 86,767.20/x
3. Step 3: Cross multiply
   150,426.72x = 207,597.60 × 86,767.20
4. Step 4: Simplify right side
   150,426.72x = 18,012,662,478.72
5. Step 5: Solve for x
   x = 18,012,662,478.72/150,426.72
6. Step 6: Final answer
   x = 119,743.77