Finding the Third Proportional to 2,290.78 and 3,276.28

Step by Step Solution

1. Step 1: Write the proportion equation
   2,290.78 : 3,276.28 = 3,276.28 : x
2. Step 2: Convert to fraction form
   2,290.78/3,276.28 = 3,276.28/x
3. Step 3: Cross multiply
   2,290.78x = 3,276.28 × 3,276.28
4. Step 4: Simplify right side
   2,290.78x = 10,734,018.83
5. Step 5: Solve for x
   x = 10,734,018.83/2,290.78
6. Step 6: Final answer
   x = 4,685.75