Finding the Fourth Proportional to 2,638.35, 3,641.72 and 1,520.09

Step by Step Solution

1. Step 1: Write the proportion equation
   2,638.35 : 3,641.72 = 1,520.09 : x
2. Step 2: Convert to fraction form
   2,638.35/3,641.72 = 1,520.09/x
3. Step 3: Cross multiply
   2,638.35x = 3,641.72 × 1,520.09
4. Step 4: Simplify right side
   2,638.35x = 5,535,716.35
5. Step 5: Solve for x
   x = 5,535,716.35/2,638.35
6. Step 6: Final answer
   x = 2,098.17