Finding the Third Proportional to 3,210.75 and 5,123.25

Step by Step Solution

1. Step 1: Write the proportion equation
   3,210.75 : 5,123.25 = 5,123.25 : x
2. Step 2: Convert to fraction form
   3,210.75/5,123.25 = 5,123.25/x
3. Step 3: Cross multiply
   3,210.75x = 5,123.25 × 5,123.25
4. Step 4: Simplify right side
   3,210.75x = 26,247,690.56
5. Step 5: Solve for x
   x = 26,247,690.56/3,210.75
6. Step 6: Final answer
   x = 8,174.94