Finding the Third Proportional to 17,715 and 38,724

Step by Step Solution

1. Step 1: Write the proportion equation
   17,715 : 38,724 = 38,724 : x
2. Step 2: Convert to fraction form
   17,715/38,724 = 38,724/x
3. Step 3: Cross multiply
   17,715x = 38,724 × 38,724
4. Step 4: Simplify right side
   17,715x = 1,499,548,176
5. Step 5: Solve for x
   x = 1,499,548,176/17,715
6. Step 6: Final answer
   x = 84,648.50