Finding the Fourth Proportional to 8,168.48, 12,248.96 and 2,620.72

Step by Step Solution

1. Step 1: Write the proportion equation
   8,168.48 : 12,248.96 = 2,620.72 : x
2. Step 2: Convert to fraction form
   8,168.48/12,248.96 = 2,620.72/x
3. Step 3: Cross multiply
   8,168.48x = 12,248.96 × 2,620.72
4. Step 4: Simplify right side
   8,168.48x = 32,101,094.45
5. Step 5: Solve for x
   x = 32,101,094.45/8,168.48
6. Step 6: Final answer
   x = 3,929.87