Finding the Third Proportional to 2,431.90 and 2,659.71

Step by Step Solution

1. Step 1: Write the proportion equation
   2,431.90 : 2,659.71 = 2,659.71 : x
2. Step 2: Convert to fraction form
   2,431.90/2,659.71 = 2,659.71/x
3. Step 3: Cross multiply
   2,431.90x = 2,659.71 × 2,659.71
4. Step 4: Simplify right side
   2,431.90x = 7,074,062.27
5. Step 5: Solve for x
   x = 7,074,062.27/2,431.90
6. Step 6: Final answer
   x = 2,908.86