Finding the Third Proportional to 5,320.69 and 8,125.31

Step by Step Solution

1. Step 1: Write the proportion equation
   5,320.69 : 8,125.31 = 8,125.31 : x
2. Step 2: Convert to fraction form
   5,320.69/8,125.31 = 8,125.31/x
3. Step 3: Cross multiply
   5,320.69x = 8,125.31 × 8,125.31
4. Step 4: Simplify right side
   5,320.69x = 66,020,703.22
5. Step 5: Solve for x
   x = 66,020,703.22/5,320.69
6. Step 6: Final answer
   x = 12,408.30