Finding the Third Proportional to 2,611.50 and 5,709

Step by Step Solution

1. Step 1: Write the proportion equation
   2,611.50 : 5,709 = 5,709 : x
2. Step 2: Convert to fraction form
   2,611.50/5,709 = 5,709/x
3. Step 3: Cross multiply
   2,611.50x = 5,709 × 5,709
4. Step 4: Simplify right side
   2,611.50x = 32,592,681
5. Step 5: Solve for x
   x = 32,592,681/2,611.50
6. Step 6: Final answer
   x = 12,480.44