Finding the Third Proportional to 2,144.50 and 3,398.50

Step by Step Solution

1. Step 1: Write the proportion equation
   2,144.50 : 3,398.50 = 3,398.50 : x
2. Step 2: Convert to fraction form
   2,144.50/3,398.50 = 3,398.50/x
3. Step 3: Cross multiply
   2,144.50x = 3,398.50 × 3,398.50
4. Step 4: Simplify right side
   2,144.50x = 11,549,802.25
5. Step 5: Solve for x
   x = 11,549,802.25/2,144.50
6. Step 6: Final answer
   x = 5,385.78