Finding the Third Proportional to 1,138.50 and 2,691.56

Step by Step Solution

1. Step 1: Write the proportion equation
   1,138.50 : 2,691.56 = 2,691.56 : x
2. Step 2: Convert to fraction form
   1,138.50/2,691.56 = 2,691.56/x
3. Step 3: Cross multiply
   1,138.50x = 2,691.56 × 2,691.56
4. Step 4: Simplify right side
   1,138.50x = 7,244,508.69
5. Step 5: Solve for x
   x = 7,244,508.69/1,138.50
6. Step 6: Final answer
   x = 6,363.20