Finding the Third Proportional to 1,518.05 and 2,278.55

Step by Step Solution

1. Step 1: Write the proportion equation
   1,518.05 : 2,278.55 = 2,278.55 : x
2. Step 2: Convert to fraction form
   1,518.05/2,278.55 = 2,278.55/x
3. Step 3: Cross multiply
   1,518.05x = 2,278.55 × 2,278.55
4. Step 4: Simplify right side
   1,518.05x = 5,191,775.86
5. Step 5: Solve for x
   x = 5,191,775.86/1,518.05
6. Step 6: Final answer
   x = 3,420.04