Finding the Third Proportional to 2,620.69 and 3,859.31

Step by Step Solution

1. Step 1: Write the proportion equation
   2,620.69 : 3,859.31 = 3,859.31 : x
2. Step 2: Convert to fraction form
   2,620.69/3,859.31 = 3,859.31/x
3. Step 3: Cross multiply
   2,620.69x = 3,859.31 × 3,859.31
4. Step 4: Simplify right side
   2,620.69x = 14,894,292.97
5. Step 5: Solve for x
   x = 14,894,292.97/2,620.69
6. Step 6: Final answer
   x = 5,683.35