Finding the Third Proportional to 1,216.25 and 2,665.25

Step by Step Solution

1. Step 1: Write the proportion equation
   1,216.25 : 2,665.25 = 2,665.25 : x
2. Step 2: Convert to fraction form
   1,216.25/2,665.25 = 2,665.25/x
3. Step 3: Cross multiply
   1,216.25x = 2,665.25 × 2,665.25
4. Step 4: Simplify right side
   1,216.25x = 7,103,557.56
5. Step 5: Solve for x
   x = 7,103,557.56/1,216.25
6. Step 6: Final answer
   x = 5,840.54