Finding the Fourth Proportional to 80,540.37, 120,708.50 and 45,499.77

Step by Step Solution

1. Step 1: Write the proportion equation
   80,540.37 : 120,708.50 = 45,499.77 : x
2. Step 2: Convert to fraction form
   80,540.37/120,708.50 = 45,499.77/x
3. Step 3: Cross multiply
   80,540.37x = 120,708.50 × 45,499.77
4. Step 4: Simplify right side
   80,540.37x = 5,492,208,759.55
5. Step 5: Solve for x
   x = 5,492,208,759.55/80,540.37
6. Step 6: Final answer
   x = 68,192.00