Finding the Third Proportional to 1,399.50 and 3,311.25

Step by Step Solution

1. Step 1: Write the proportion equation
   1,399.50 : 3,311.25 = 3,311.25 : x
2. Step 2: Convert to fraction form
   1,399.50/3,311.25 = 3,311.25/x
3. Step 3: Cross multiply
   1,399.50x = 3,311.25 × 3,311.25
4. Step 4: Simplify right side
   1,399.50x = 10,964,376.56
5. Step 5: Solve for x
   x = 10,964,376.56/1,399.50
6. Step 6: Final answer
   x = 7,834.50