Finding the Third Proportional to 17,921.25 and 39,168.56

Step by Step Solution

1. Step 1: Write the proportion equation
   17,921.25 : 39,168.56 = 39,168.56 : x
2. Step 2: Convert to fraction form
   17,921.25/39,168.56 = 39,168.56/x
3. Step 3: Cross multiply
   17,921.25x = 39,168.56 × 39,168.56
4. Step 4: Simplify right side
   17,921.25x = 1,534,176,288.32
5. Step 5: Solve for x
   x = 1,534,176,288.32/17,921.25
6. Step 6: Final answer
   x = 85,606.54