Finding the Third Proportional to 17,921.25 and 38,986.31

Step by Step Solution

1. Step 1: Write the proportion equation
   17,921.25 : 38,986.31 = 38,986.31 : x
2. Step 2: Convert to fraction form
   17,921.25/38,986.31 = 38,986.31/x
3. Step 3: Cross multiply
   17,921.25x = 38,986.31 × 38,986.31
4. Step 4: Simplify right side
   17,921.25x = 1,519,932,562.35
5. Step 5: Solve for x
   x = 1,519,932,562.35/17,921.25
6. Step 6: Final answer
   x = 84,811.75