Finding the Third Proportional to 2,543.91 and 5,449.78

Step by Step Solution

1. Step 1: Write the proportion equation
   2,543.91 : 5,449.78 = 5,449.78 : x
2. Step 2: Convert to fraction form
   2,543.91/5,449.78 = 5,449.78/x
3. Step 3: Cross multiply
   2,543.91x = 5,449.78 × 5,449.78
4. Step 4: Simplify right side
   2,543.91x = 29,700,115.67
5. Step 5: Solve for x
   x = 29,700,115.67/2,543.91
6. Step 6: Final answer
   x = 11,675.00