Finding the Third Proportional to 3,198.75 and 3,631.50

Step by Step Solution

1. Step 1: Write the proportion equation
   3,198.75 : 3,631.50 = 3,631.50 : x
2. Step 2: Convert to fraction form
   3,198.75/3,631.50 = 3,631.50/x
3. Step 3: Cross multiply
   3,198.75x = 3,631.50 × 3,631.50
4. Step 4: Simplify right side
   3,198.75x = 13,187,792.25
5. Step 5: Solve for x
   x = 13,187,792.25/3,198.75
6. Step 6: Final answer
   x = 4,122.80