Finding the Fourth Proportional to 80,205.89, 120,526.93 and 42,792.40

Step by Step Solution

1. Step 1: Write the proportion equation
   80,205.89 : 120,526.93 = 42,792.40 : x
2. Step 2: Convert to fraction form
   80,205.89/120,526.93 = 42,792.40/x
3. Step 3: Cross multiply
   80,205.89x = 120,526.93 × 42,792.40
4. Step 4: Simplify right side
   80,205.89x = 5,157,635,996.70
5. Step 5: Solve for x
   x = 5,157,635,996.70/80,205.89
6. Step 6: Final answer
   x = 64,304.95