Finding the Fourth Proportional to 150,687, 207,957.78 and 83,619

Step by Step Solution

1. Step 1: Write the proportion equation
   150,687 : 207,957.78 = 83,619 : x
2. Step 2: Convert to fraction form
   150,687/207,957.78 = 83,619/x
3. Step 3: Cross multiply
   150,687x = 207,957.78 × 83,619
4. Step 4: Simplify right side
   150,687x = 17,389,221,605.82
5. Step 5: Solve for x
   x = 17,389,221,605.82/150,687
6. Step 6: Final answer
   x = 115,399.61