Finding the Third Proportional to 1,521.28 and 3,158.16

Step by Step Solution

1. Step 1: Write the proportion equation
   1,521.28 : 3,158.16 = 3,158.16 : x
2. Step 2: Convert to fraction form
   1,521.28/3,158.16 = 3,158.16/x
3. Step 3: Cross multiply
   1,521.28x = 3,158.16 × 3,158.16
4. Step 4: Simplify right side
   1,521.28x = 9,973,950.90
5. Step 5: Solve for x
   x = 9,973,950.90/1,521.28
6. Step 6: Final answer
   x = 6,556.28