Finding the Fourth Proportional to 2,640.15, 3,643.82 and 1,505.82

Step by Step Solution

1. Step 1: Write the proportion equation
   2,640.15 : 3,643.82 = 1,505.82 : x
2. Step 2: Convert to fraction form
   2,640.15/3,643.82 = 1,505.82/x
3. Step 3: Cross multiply
   2,640.15x = 3,643.82 × 1,505.82
4. Step 4: Simplify right side
   2,640.15x = 5,486,948.81
5. Step 5: Solve for x
   x = 5,486,948.81/2,640.15
6. Step 6: Final answer
   x = 2,078.27