Finding the Fourth Proportional to 2,638.91, 3,641.83 and 1,520.03

Step by Step Solution

1. Step 1: Write the proportion equation
   2,638.91 : 3,641.83 = 1,520.03 : x
2. Step 2: Convert to fraction form
   2,638.91/3,641.83 = 1,520.03/x
3. Step 3: Cross multiply
   2,638.91x = 3,641.83 × 1,520.03
4. Step 4: Simplify right side
   2,638.91x = 5,535,668.85
5. Step 5: Solve for x
   x = 5,535,668.85/2,638.91
6. Step 6: Final answer
   x = 2,097.71