Finding the Third Proportional to 2,116.50 and 3,215.25

Step by Step Solution

1. Step 1: Write the proportion equation
   2,116.50 : 3,215.25 = 3,215.25 : x
2. Step 2: Convert to fraction form
   2,116.50/3,215.25 = 3,215.25/x
3. Step 3: Cross multiply
   2,116.50x = 3,215.25 × 3,215.25
4. Step 4: Simplify right side
   2,116.50x = 10,337,832.56
5. Step 5: Solve for x
   x = 10,337,832.56/2,116.50
6. Step 6: Final answer
   x = 4,884.40