Finding the Fourth Proportional to 2,648.08, 3,970.68 and 1,108.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,648.08 : 3,970.68 = 1,108.72 : x
2. Step 2: Convert to fraction form
   2,648.08/3,970.68 = 1,108.72/x
3. Step 3: Cross multiply
   2,648.08x = 3,970.68 × 1,108.72
4. Step 4: Simplify right side
   2,648.08x = 4,402,372.33
5. Step 5: Solve for x
   x = 4,402,372.33/2,648.08
6. Step 6: Final answer
   x = 1,662.48