Finding the Fourth Proportional to 6,752.50, 10,128.78 and 2,648.50

Step by Step Solution

1. Step 1: Write the proportion equation
   6,752.50 : 10,128.78 = 2,648.50 : x
2. Step 2: Convert to fraction form
   6,752.50/10,128.78 = 2,648.50/x
3. Step 3: Cross multiply
   6,752.50x = 10,128.78 × 2,648.50
4. Step 4: Simplify right side
   6,752.50x = 26,826,073.83
5. Step 5: Solve for x
   x = 26,826,073.83/6,752.50
6. Step 6: Final answer
   x = 3,972.76