Finding the Fourth Proportional to 120,499.63, 166,220.23 and 75,155.83

Step by Step Solution

1. Step 1: Write the proportion equation
   120,499.63 : 166,220.23 = 75,155.83 : x
2. Step 2: Convert to fraction form
   120,499.63/166,220.23 = 75,155.83/x
3. Step 3: Cross multiply
   120,499.63x = 166,220.23 × 75,155.83
4. Step 4: Simplify right side
   120,499.63x = 12,492,419,348.44
5. Step 5: Solve for x
   x = 12,492,419,348.44/120,499.63
6. Step 6: Final answer
   x = 103,671.85