Finding the Third Proportional to 3,945.23 and 8,505.42

Step by Step Solution

1. Step 1: Write the proportion equation
   3,945.23 : 8,505.42 = 8,505.42 : x
2. Step 2: Convert to fraction form
   3,945.23/8,505.42 = 8,505.42/x
3. Step 3: Cross multiply
   3,945.23x = 8,505.42 × 8,505.42
4. Step 4: Simplify right side
   3,945.23x = 72,342,201.27
5. Step 5: Solve for x
   x = 72,342,201.27/3,945.23
6. Step 6: Final answer
   x = 18,336.60