Finding the Fourth Proportional to 80,057.34, 120,105.69 and 56,411.03

Step by Step Solution

1. Step 1: Write the proportion equation
   80,057.34 : 120,105.69 = 56,411.03 : x
2. Step 2: Convert to fraction form
   80,057.34/120,105.69 = 56,411.03/x
3. Step 3: Cross multiply
   80,057.34x = 120,105.69 × 56,411.03
4. Step 4: Simplify right side
   80,057.34x = 6,775,285,770.48
5. Step 5: Solve for x
   x = 6,775,285,770.48/80,057.34
6. Step 6: Final answer
   x = 84,630.42