Finding the Fourth Proportional to 57,757.62, 80,113.28 and 56,221.42

Step by Step Solution

1. Step 1: Write the proportion equation
   57,757.62 : 80,113.28 = 56,221.42 : x
2. Step 2: Convert to fraction form
   57,757.62/80,113.28 = 56,221.42/x
3. Step 3: Cross multiply
   57,757.62x = 80,113.28 × 56,221.42
4. Step 4: Simplify right side
   57,757.62x = 4,504,082,573.34
5. Step 5: Solve for x
   x = 4,504,082,573.34/57,757.62
6. Step 6: Final answer
   x = 77,982.49