Finding the Third Proportional to 2,857.50 and 3,117.38

Step by Step Solution

1. Step 1: Write the proportion equation
   2,857.50 : 3,117.38 = 3,117.38 : x
2. Step 2: Convert to fraction form
   2,857.50/3,117.38 = 3,117.38/x
3. Step 3: Cross multiply
   2,857.50x = 3,117.38 × 3,117.38
4. Step 4: Simplify right side
   2,857.50x = 9,718,026.89
5. Step 5: Solve for x
   x = 9,718,026.89/2,857.50
6. Step 6: Final answer
   x = 3,400.88