Finding the Fourth Proportional to 150,300.54, 207,414.81 and 86,637.78

Step by Step Solution

1. Step 1: Write the proportion equation
   150,300.54 : 207,414.81 = 86,637.78 : x
2. Step 2: Convert to fraction form
   150,300.54/207,414.81 = 86,637.78/x
3. Step 3: Cross multiply
   150,300.54x = 207,414.81 × 86,637.78
4. Step 4: Simplify right side
   150,300.54x = 17,969,958,677.52
5. Step 5: Solve for x
   x = 17,969,958,677.52/150,300.54
6. Step 6: Final answer
   x = 119,560.17