Finding the Fourth Proportional to 150,876.18, 208,300.56 and 99,932.57

Step by Step Solution

1. Step 1: Write the proportion equation
   150,876.18 : 208,300.56 = 99,932.57 : x
2. Step 2: Convert to fraction form
   150,876.18/208,300.56 = 99,932.57/x
3. Step 3: Cross multiply
   150,876.18x = 208,300.56 × 99,932.57
4. Step 4: Simplify right side
   150,876.18x = 20,816,010,782.81
5. Step 5: Solve for x
   x = 20,816,010,782.81/150,876.18
6. Step 6: Final answer
   x = 137,967.51