Finding the Third Proportional to 5,562.42 and 8,662.78

Step by Step Solution

1. Step 1: Write the proportion equation
   5,562.42 : 8,662.78 = 8,662.78 : x
2. Step 2: Convert to fraction form
   5,562.42/8,662.78 = 8,662.78/x
3. Step 3: Cross multiply
   5,562.42x = 8,662.78 × 8,662.78
4. Step 4: Simplify right side
   5,562.42x = 75,043,778.99
5. Step 5: Solve for x
   x = 75,043,778.99/5,562.42
6. Step 6: Final answer
   x = 13,491.21