Finding the Fourth Proportional to 120,499.38, 166,321.98 and 75,150.54

Step by Step Solution

1. Step 1: Write the proportion equation
   120,499.38 : 166,321.98 = 75,150.54 : x
2. Step 2: Convert to fraction form
   120,499.38/166,321.98 = 75,150.54/x
3. Step 3: Cross multiply
   120,499.38x = 166,321.98 × 75,150.54
4. Step 4: Simplify right side
   120,499.38x = 12,499,186,610.87
5. Step 5: Solve for x
   x = 12,499,186,610.87/120,499.38
6. Step 6: Final answer
   x = 103,728.22