Finding the Third Proportional to 2,560.99 and 5,340.94

Step by Step Solution

1. Step 1: Write the proportion equation
   2,560.99 : 5,340.94 = 5,340.94 : x
2. Step 2: Convert to fraction form
   2,560.99/5,340.94 = 5,340.94/x
3. Step 3: Cross multiply
   2,560.99x = 5,340.94 × 5,340.94
4. Step 4: Simplify right side
   2,560.99x = 28,525,613.38
5. Step 5: Solve for x
   x = 28,525,613.38/2,560.99
6. Step 6: Final answer
   x = 11,138.50