Finding the Third Proportional to 2,315.25 and 3,143.81

Step by Step Solution

1. Step 1: Write the proportion equation
   2,315.25 : 3,143.81 = 3,143.81 : x
2. Step 2: Convert to fraction form
   2,315.25/3,143.81 = 3,143.81/x
3. Step 3: Cross multiply
   2,315.25x = 3,143.81 × 3,143.81
4. Step 4: Simplify right side
   2,315.25x = 9,883,557.04
5. Step 5: Solve for x
   x = 9,883,557.04/2,315.25
6. Step 6: Final answer
   x = 4,268.89