Finding the Third Proportional to 2,543.94 and 5,423.90

Step by Step Solution

1. Step 1: Write the proportion equation
   2,543.94 : 5,423.90 = 5,423.90 : x
2. Step 2: Convert to fraction form
   2,543.94/5,423.90 = 5,423.90/x
3. Step 3: Cross multiply
   2,543.94x = 5,423.90 × 5,423.90
4. Step 4: Simplify right side
   2,543.94x = 29,418,674.26
5. Step 5: Solve for x
   x = 29,418,674.26/2,543.94
6. Step 6: Final answer
   x = 11,564.23