Finding the Third Proportional to 2,560.99 and 5,636.46

Step by Step Solution

1. Step 1: Write the proportion equation
   2,560.99 : 5,636.46 = 5,636.46 : x
2. Step 2: Convert to fraction form
   2,560.99/5,636.46 = 5,636.46/x
3. Step 3: Cross multiply
   2,560.99x = 5,636.46 × 5,636.46
4. Step 4: Simplify right side
   2,560.99x = 31,769,691.90
5. Step 5: Solve for x
   x = 31,769,691.90/2,560.99
6. Step 6: Final answer
   x = 12,405.23