Finding the Third Proportional to 2,818.55 and 3,100.78

Step by Step Solution

1. Step 1: Write the proportion equation
   2,818.55 : 3,100.78 = 3,100.78 : x
2. Step 2: Convert to fraction form
   2,818.55/3,100.78 = 3,100.78/x
3. Step 3: Cross multiply
   2,818.55x = 3,100.78 × 3,100.78
4. Step 4: Simplify right side
   2,818.55x = 9,614,844.36
5. Step 5: Solve for x
   x = 9,614,844.36/2,818.55
6. Step 6: Final answer
   x = 3,411.28