Finding the Third Proportional to 1,087.17 and 2,315.25

Step by Step Solution

1. Step 1: Write the proportion equation
   1,087.17 : 2,315.25 = 2,315.25 : x
2. Step 2: Convert to fraction form
   1,087.17/2,315.25 = 2,315.25/x
3. Step 3: Cross multiply
   1,087.17x = 2,315.25 × 2,315.25
4. Step 4: Simplify right side
   1,087.17x = 5,360,382.56
5. Step 5: Solve for x
   x = 5,360,382.56/1,087.17
6. Step 6: Final answer
   x = 4,930.58