Finding the Third Proportional to 1,728.38 and 3,709.88

Step by Step Solution

1. Step 1: Write the proportion equation
   1,728.38 : 3,709.88 = 3,709.88 : x
2. Step 2: Convert to fraction form
   1,728.38/3,709.88 = 3,709.88/x
3. Step 3: Cross multiply
   1,728.38x = 3,709.88 × 3,709.88
4. Step 4: Simplify right side
   1,728.38x = 13,763,172.52
5. Step 5: Solve for x
   x = 13,763,172.52/1,728.38
6. Step 6: Final answer
   x = 7,963.07