Finding the Fourth Proportional to 2,108.43, 2,908.71 and 1,636.47

Step by Step Solution

1. Step 1: Write the proportion equation
   2,108.43 : 2,908.71 = 1,636.47 : x
2. Step 2: Convert to fraction form
   2,108.43/2,908.71 = 1,636.47/x
3. Step 3: Cross multiply
   2,108.43x = 2,908.71 × 1,636.47
4. Step 4: Simplify right side
   2,108.43x = 4,760,016.65
5. Step 5: Solve for x
   x = 4,760,016.65/2,108.43
6. Step 6: Final answer
   x = 2,257.61