Finding the Third Proportional to 3,622.50 and 3,991.50

Step by Step Solution

1. Step 1: Write the proportion equation
   3,622.50 : 3,991.50 = 3,991.50 : x
2. Step 2: Convert to fraction form
   3,622.50/3,991.50 = 3,991.50/x
3. Step 3: Cross multiply
   3,622.50x = 3,991.50 × 3,991.50
4. Step 4: Simplify right side
   3,622.50x = 15,932,072.25
5. Step 5: Solve for x
   x = 15,932,072.25/3,622.50
6. Step 6: Final answer
   x = 4,398.09