Finding the Fourth Proportional to 80,665.10, 120,900.45 and 41,201.90

Step by Step Solution

1. Step 1: Write the proportion equation
   80,665.10 : 120,900.45 = 41,201.90 : x
2. Step 2: Convert to fraction form
   80,665.10/120,900.45 = 41,201.90/x
3. Step 3: Cross multiply
   80,665.10x = 120,900.45 × 41,201.90
4. Step 4: Simplify right side
   80,665.10x = 4,981,328,250.86
5. Step 5: Solve for x
   x = 4,981,328,250.86/80,665.10
6. Step 6: Final answer
   x = 61,753.20