Finding the Third Proportional to 5,328.28 and 7,992.56

Step by Step Solution

1. Step 1: Write the proportion equation
   5,328.28 : 7,992.56 = 7,992.56 : x
2. Step 2: Convert to fraction form
   5,328.28/7,992.56 = 7,992.56/x
3. Step 3: Cross multiply
   5,328.28x = 7,992.56 × 7,992.56
4. Step 4: Simplify right side
   5,328.28x = 63,881,055.32
5. Step 5: Solve for x
   x = 63,881,055.32/5,328.28
6. Step 6: Final answer
   x = 11,989.05