Finding the Fourth Proportional to 2,639.34, 3,642.57 and 1,520.34

Step by Step Solution

1. Step 1: Write the proportion equation
   2,639.34 : 3,642.57 = 1,520.34 : x
2. Step 2: Convert to fraction form
   2,639.34/3,642.57 = 1,520.34/x
3. Step 3: Cross multiply
   2,639.34x = 3,642.57 × 1,520.34
4. Step 4: Simplify right side
   2,639.34x = 5,537,944.87
5. Step 5: Solve for x
   x = 5,537,944.87/2,639.34
6. Step 6: Final answer
   x = 2,098.23