Finding the Fourth Proportional to 2,640.28, 3,642.90 and 1,520.96

Step by Step Solution

1. Step 1: Write the proportion equation
   2,640.28 : 3,642.90 = 1,520.96 : x
2. Step 2: Convert to fraction form
   2,640.28/3,642.90 = 1,520.96/x
3. Step 3: Cross multiply
   2,640.28x = 3,642.90 × 1,520.96
4. Step 4: Simplify right side
   2,640.28x = 5,540,705.18
5. Step 5: Solve for x
   x = 5,540,705.18/2,640.28
6. Step 6: Final answer
   x = 2,098.53