Finding the Third Proportional to 5,459.34 and 8,240.91

Step by Step Solution

1. Step 1: Write the proportion equation
   5,459.34 : 8,240.91 = 8,240.91 : x
2. Step 2: Convert to fraction form
   5,459.34/8,240.91 = 8,240.91/x
3. Step 3: Cross multiply
   5,459.34x = 8,240.91 × 8,240.91
4. Step 4: Simplify right side
   5,459.34x = 67,912,535.82
5. Step 5: Solve for x
   x = 67,912,535.82/5,459.34
6. Step 6: Final answer
   x = 12,439.69