Finding the Third Proportional to 2,731.78 and 5,658

Step by Step Solution

1. Step 1: Write the proportion equation
   2,731.78 : 5,658 = 5,658 : x
2. Step 2: Convert to fraction form
   2,731.78/5,658 = 5,658/x
3. Step 3: Cross multiply
   2,731.78x = 5,658 × 5,658
4. Step 4: Simplify right side
   2,731.78x = 32,012,964
5. Step 5: Solve for x
   x = 32,012,964/2,731.78
6. Step 6: Final answer
   x = 11,718.71