Finding the Fourth Proportional to 8,132.56, 11,223.72 and 4,990.80

Step by Step Solution

1. Step 1: Write the proportion equation
   8,132.56 : 11,223.72 = 4,990.80 : x
2. Step 2: Convert to fraction form
   8,132.56/11,223.72 = 4,990.80/x
3. Step 3: Cross multiply
   8,132.56x = 11,223.72 × 4,990.80
4. Step 4: Simplify right side
   8,132.56x = 56,015,341.78
5. Step 5: Solve for x
   x = 56,015,341.78/8,132.56
6. Step 6: Final answer
   x = 6,887.79