Finding the Third Proportional to 3,389 and 5,311.50

Step by Step Solution

1. Step 1: Write the proportion equation
   3,389 : 5,311.50 = 5,311.50 : x
2. Step 2: Convert to fraction form
   3,389/5,311.50 = 5,311.50/x
3. Step 3: Cross multiply
   3,389x = 5,311.50 × 5,311.50
4. Step 4: Simplify right side
   3,389x = 28,212,032.25
5. Step 5: Solve for x
   x = 28,212,032.25/3,389
6. Step 6: Final answer
   x = 8,324.59