Finding the Third Proportional to 2,658.50 and 5,820.50

Step by Step Solution

1. Step 1: Write the proportion equation
   2,658.50 : 5,820.50 = 5,820.50 : x
2. Step 2: Convert to fraction form
   2,658.50/5,820.50 = 5,820.50/x
3. Step 3: Cross multiply
   2,658.50x = 5,820.50 × 5,820.50
4. Step 4: Simplify right side
   2,658.50x = 33,878,220.25
5. Step 5: Solve for x
   x = 33,878,220.25/2,658.50
6. Step 6: Final answer
   x = 12,743.36