Finding the Fourth Proportional to 2,833.07, 3,909.91 and 1,638.10

Step by Step Solution

1. Step 1: Write the proportion equation
   2,833.07 : 3,909.91 = 1,638.10 : x
2. Step 2: Convert to fraction form
   2,833.07/3,909.91 = 1,638.10/x
3. Step 3: Cross multiply
   2,833.07x = 3,909.91 × 1,638.10
4. Step 4: Simplify right side
   2,833.07x = 6,404,815.38
5. Step 5: Solve for x
   x = 6,404,815.38/2,833.07
6. Step 6: Final answer
   x = 2,260.74