Finding the Third Proportional to 1,231.88 and 2,691.38

Step by Step Solution

1. Step 1: Write the proportion equation
   1,231.88 : 2,691.38 = 2,691.38 : x
2. Step 2: Convert to fraction form
   1,231.88/2,691.38 = 2,691.38/x
3. Step 3: Cross multiply
   1,231.88x = 2,691.38 × 2,691.38
4. Step 4: Simplify right side
   1,231.88x = 7,243,499.39
5. Step 5: Solve for x
   x = 7,243,499.39/1,231.88
6. Step 6: Final answer
   x = 5,880.06