Finding the Third Proportional to 2,728.88 and 4,172.25

Step by Step Solution

1. Step 1: Write the proportion equation
   2,728.88 : 4,172.25 = 4,172.25 : x
2. Step 2: Convert to fraction form
   2,728.88/4,172.25 = 4,172.25/x
3. Step 3: Cross multiply
   2,728.88x = 4,172.25 × 4,172.25
4. Step 4: Simplify right side
   2,728.88x = 17,407,670.06
5. Step 5: Solve for x
   x = 17,407,670.06/2,728.88
6. Step 6: Final answer
   x = 6,379.06