Finding the Fourth Proportional to 150,123.39, 207,168.50 and 82,139.58

Step by Step Solution

1. Step 1: Write the proportion equation
   150,123.39 : 207,168.50 = 82,139.58 : x
2. Step 2: Convert to fraction form
   150,123.39/207,168.50 = 82,139.58/x
3. Step 3: Cross multiply
   150,123.39x = 207,168.50 × 82,139.58
4. Step 4: Simplify right side
   150,123.39x = 17,016,733,168.53
5. Step 5: Solve for x
   x = 17,016,733,168.53/150,123.39
6. Step 6: Final answer
   x = 113,351.64