Finding the Third Proportional to 1,328.06 and 3,115.55

Step by Step Solution

1. Step 1: Write the proportion equation
   1,328.06 : 3,115.55 = 3,115.55 : x
2. Step 2: Convert to fraction form
   1,328.06/3,115.55 = 3,115.55/x
3. Step 3: Cross multiply
   1,328.06x = 3,115.55 × 3,115.55
4. Step 4: Simplify right side
   1,328.06x = 9,706,632.33
5. Step 5: Solve for x
   x = 9,706,632.33/1,328.06
6. Step 6: Final answer
   x = 7,308.87