Finding the Fourth Proportional to 8,162.72, 11,260.32 and 5,647.20

Step by Step Solution

1. Step 1: Write the proportion equation
   8,162.72 : 11,260.32 = 5,647.20 : x
2. Step 2: Convert to fraction form
   8,162.72/11,260.32 = 5,647.20/x
3. Step 3: Cross multiply
   8,162.72x = 11,260.32 × 5,647.20
4. Step 4: Simplify right side
   8,162.72x = 63,589,279.10
5. Step 5: Solve for x
   x = 63,589,279.10/8,162.72
6. Step 6: Final answer
   x = 7,790.21