Finding the Third Proportional to 3,921.54 and 8,557.52

Step by Step Solution

1. Step 1: Write the proportion equation
   3,921.54 : 8,557.52 = 8,557.52 : x
2. Step 2: Convert to fraction form
   3,921.54/8,557.52 = 8,557.52/x
3. Step 3: Cross multiply
   3,921.54x = 8,557.52 × 8,557.52
4. Step 4: Simplify right side
   3,921.54x = 73,231,207.38
5. Step 5: Solve for x
   x = 73,231,207.38/3,921.54
6. Step 6: Final answer
   x = 18,674.10