Finding the Fourth Proportional to 80,369.89, 120,561.41 and 40,368.31

Step by Step Solution

1. Step 1: Write the proportion equation
   80,369.89 : 120,561.41 = 40,368.31 : x
2. Step 2: Convert to fraction form
   80,369.89/120,561.41 = 40,368.31/x
3. Step 3: Cross multiply
   80,369.89x = 120,561.41 × 40,368.31
4. Step 4: Simplify right side
   80,369.89x = 4,866,860,398.83
5. Step 5: Solve for x
   x = 4,866,860,398.83/80,369.89
6. Step 6: Final answer
   x = 60,555.76