Finding the Third Proportional to 851.50 and 2,104

Step by Step Solution

1. Step 1: Write the proportion equation
   851.50 : 2,104 = 2,104 : x
2. Step 2: Convert to fraction form
   851.50/2,104 = 2,104/x
3. Step 3: Cross multiply
   851.50x = 2,104 × 2,104
4. Step 4: Simplify right side
   851.50x = 4,426,816
5. Step 5: Solve for x
   x = 4,426,816/851.50
6. Step 6: Final answer
   x = 5,198.84