Finding the Fourth Proportional to 120,498.63, 166,218.85 and 75,154.83

Step by Step Solution

1. Step 1: Write the proportion equation
   120,498.63 : 166,218.85 = 75,154.83 : x
2. Step 2: Convert to fraction form
   120,498.63/166,218.85 = 75,154.83/x
3. Step 3: Cross multiply
   120,498.63x = 166,218.85 × 75,154.83
4. Step 4: Simplify right side
   120,498.63x = 12,492,149,414.55
5. Step 5: Solve for x
   x = 12,492,149,414.55/120,498.63
6. Step 6: Final answer
   x = 103,670.47