Finding the Fourth Proportional to 2,638.88, 3,641.52 and 1,520

Step by Step Solution

1. Step 1: Write the proportion equation
   2,638.88 : 3,641.52 = 1,520 : x
2. Step 2: Convert to fraction form
   2,638.88/3,641.52 = 1,520/x
3. Step 3: Cross multiply
   2,638.88x = 3,641.52 × 1,520
4. Step 4: Simplify right side
   2,638.88x = 5,535,110.40
5. Step 5: Solve for x
   x = 5,535,110.40/2,638.88
6. Step 6: Final answer
   x = 2,097.52