Finding the Third Proportional to 17,821 and 38,391.50

Step by Step Solution

1. Step 1: Write the proportion equation
   17,821 : 38,391.50 = 38,391.50 : x
2. Step 2: Convert to fraction form
   17,821/38,391.50 = 38,391.50/x
3. Step 3: Cross multiply
   17,821x = 38,391.50 × 38,391.50
4. Step 4: Simplify right side
   17,821x = 1,473,907,272.25
5. Step 5: Solve for x
   x = 1,473,907,272.25/17,821
6. Step 6: Final answer
   x = 82,706.20