Finding the Third Proportional to 2,278.50 and 3,540

Step by Step Solution

1. Step 1: Write the proportion equation
   2,278.50 : 3,540 = 3,540 : x
2. Step 2: Convert to fraction form
   2,278.50/3,540 = 3,540/x
3. Step 3: Cross multiply
   2,278.50x = 3,540 × 3,540
4. Step 4: Simplify right side
   2,278.50x = 12,531,600
5. Step 5: Solve for x
   x = 12,531,600/2,278.50
6. Step 6: Final answer
   x = 5,499.93