Finding the Third Proportional to 3,399 and 5,123.50

Step by Step Solution

1. Step 1: Write the proportion equation
   3,399 : 5,123.50 = 5,123.50 : x
2. Step 2: Convert to fraction form
   3,399/5,123.50 = 5,123.50/x
3. Step 3: Cross multiply
   3,399x = 5,123.50 × 5,123.50
4. Step 4: Simplify right side
   3,399x = 26,250,252.25
5. Step 5: Solve for x
   x = 26,250,252.25/3,399
6. Step 6: Final answer
   x = 7,722.93