Finding the Third Proportional to 17,512.50 and 38,578.50

Step by Step Solution

1. Step 1: Write the proportion equation
   17,512.50 : 38,578.50 = 38,578.50 : x
2. Step 2: Convert to fraction form
   17,512.50/38,578.50 = 38,578.50/x
3. Step 3: Cross multiply
   17,512.50x = 38,578.50 × 38,578.50
4. Step 4: Simplify right side
   17,512.50x = 1,488,300,662.25
5. Step 5: Solve for x
   x = 1,488,300,662.25/17,512.50
6. Step 6: Final answer
   x = 84,985.05