Finding the Fourth Proportional to 80,493.80, 120,855.90 and 45,501.80

Step by Step Solution

1. Step 1: Write the proportion equation
   80,493.80 : 120,855.90 = 45,501.80 : x
2. Step 2: Convert to fraction form
   80,493.80/120,855.90 = 45,501.80/x
3. Step 3: Cross multiply
   80,493.80x = 120,855.90 × 45,501.80
4. Step 4: Simplify right side
   80,493.80x = 5,499,160,990.62
5. Step 5: Solve for x
   x = 5,499,160,990.62/80,493.80
6. Step 6: Final answer
   x = 68,317.82