Finding the Third Proportional to 1,621.69 and 2,479.78

Step by Step Solution

1. Step 1: Write the proportion equation
   1,621.69 : 2,479.78 = 2,479.78 : x
2. Step 2: Convert to fraction form
   1,621.69/2,479.78 = 2,479.78/x
3. Step 3: Cross multiply
   1,621.69x = 2,479.78 × 2,479.78
4. Step 4: Simplify right side
   1,621.69x = 6,149,315.05
5. Step 5: Solve for x
   x = 6,149,315.05/1,621.69
6. Step 6: Final answer
   x = 3,791.92