Finding the Fourth Proportional to 8,757.90, 12,085.43 and 4,980.56

Step by Step Solution

1. Step 1: Write the proportion equation
   8,757.90 : 12,085.43 = 4,980.56 : x
2. Step 2: Convert to fraction form
   8,757.90/12,085.43 = 4,980.56/x
3. Step 3: Cross multiply
   8,757.90x = 12,085.43 × 4,980.56
4. Step 4: Simplify right side
   8,757.90x = 60,192,123.91
5. Step 5: Solve for x
   x = 60,192,123.91/8,757.90
6. Step 6: Final answer
   x = 6,872.89