Finding the Fourth Proportional to 80,404.88, 120,682.04 and 40,991.60

Step by Step Solution

1. Step 1: Write the proportion equation
   80,404.88 : 120,682.04 = 40,991.60 : x
2. Step 2: Convert to fraction form
   80,404.88/120,682.04 = 40,991.60/x
3. Step 3: Cross multiply
   80,404.88x = 120,682.04 × 40,991.60
4. Step 4: Simplify right side
   80,404.88x = 4,946,949,910.86
5. Step 5: Solve for x
   x = 4,946,949,910.86/80,404.88
6. Step 6: Final answer
   x = 61,525.49