Finding the Third Proportional to 2,688.56 and 4,152.75

Step by Step Solution

1. Step 1: Write the proportion equation
   2,688.56 : 4,152.75 = 4,152.75 : x
2. Step 2: Convert to fraction form
   2,688.56/4,152.75 = 4,152.75/x
3. Step 3: Cross multiply
   2,688.56x = 4,152.75 × 4,152.75
4. Step 4: Simplify right side
   2,688.56x = 17,245,332.56
5. Step 5: Solve for x
   x = 17,245,332.56/2,688.56
6. Step 6: Final answer
   x = 6,414.33