Finding the Third Proportional to 2,215.75 and 3,261.88

Step by Step Solution

1. Step 1: Write the proportion equation
   2,215.75 : 3,261.88 = 3,261.88 : x
2. Step 2: Convert to fraction form
   2,215.75/3,261.88 = 3,261.88/x
3. Step 3: Cross multiply
   2,215.75x = 3,261.88 × 3,261.88
4. Step 4: Simplify right side
   2,215.75x = 10,639,828.52
5. Step 5: Solve for x
   x = 10,639,828.52/2,215.75
6. Step 6: Final answer
   x = 4,801.91