Finding the Third Proportional to 2,718.56 and 3,123.56

Step by Step Solution

1. Step 1: Write the proportion equation
   2,718.56 : 3,123.56 = 3,123.56 : x
2. Step 2: Convert to fraction form
   2,718.56/3,123.56 = 3,123.56/x
3. Step 3: Cross multiply
   2,718.56x = 3,123.56 × 3,123.56
4. Step 4: Simplify right side
   2,718.56x = 9,756,642.69
5. Step 5: Solve for x
   x = 9,756,642.69/2,718.56
6. Step 6: Final answer
   x = 3,588.90