Finding the Fourth Proportional to 8,118.72, 12,156.32 and 5,648.32

Step by Step Solution

1. Step 1: Write the proportion equation
   8,118.72 : 12,156.32 = 5,648.32 : x
2. Step 2: Convert to fraction form
   8,118.72/12,156.32 = 5,648.32/x
3. Step 3: Cross multiply
   8,118.72x = 12,156.32 × 5,648.32
4. Step 4: Simplify right side
   8,118.72x = 68,662,785.38
5. Step 5: Solve for x
   x = 68,662,785.38/8,118.72
6. Step 6: Final answer
   x = 8,457.34