Finding the Third Proportional to 2,215.50 and 5,268.75

Step by Step Solution

1. Step 1: Write the proportion equation
   2,215.50 : 5,268.75 = 5,268.75 : x
2. Step 2: Convert to fraction form
   2,215.50/5,268.75 = 5,268.75/x
3. Step 3: Cross multiply
   2,215.50x = 5,268.75 × 5,268.75
4. Step 4: Simplify right side
   2,215.50x = 27,759,726.56
5. Step 5: Solve for x
   x = 27,759,726.56/2,215.50
6. Step 6: Final answer
   x = 12,529.78