Finding the Fourth Proportional to 8,756, 12,080.24 and 4,978.72

Step by Step Solution

1. Step 1: Write the proportion equation
   8,756 : 12,080.24 = 4,978.72 : x
2. Step 2: Convert to fraction form
   8,756/12,080.24 = 4,978.72/x
3. Step 3: Cross multiply
   8,756x = 12,080.24 × 4,978.72
4. Step 4: Simplify right side
   8,756x = 60,144,132.49
5. Step 5: Solve for x
   x = 60,144,132.49/8,756
6. Step 6: Final answer
   x = 6,868.91