Finding the Third Proportional to 13,215.50 and 27,728.50

Step by Step Solution

1. Step 1: Write the proportion equation
   13,215.50 : 27,728.50 = 27,728.50 : x
2. Step 2: Convert to fraction form
   13,215.50/27,728.50 = 27,728.50/x
3. Step 3: Cross multiply
   13,215.50x = 27,728.50 × 27,728.50
4. Step 4: Simplify right side
   13,215.50x = 768,869,712.25
5. Step 5: Solve for x
   x = 768,869,712.25/13,215.50
6. Step 6: Final answer
   x = 58,179.39