Finding the Fourth Proportional to 2,640.42, 3,645.72 and 2,012.04

Step by Step Solution

1. Step 1: Write the proportion equation
   2,640.42 : 3,645.72 = 2,012.04 : x
2. Step 2: Convert to fraction form
   2,640.42/3,645.72 = 2,012.04/x
3. Step 3: Cross multiply
   2,640.42x = 3,645.72 × 2,012.04
4. Step 4: Simplify right side
   2,640.42x = 7,335,334.47
5. Step 5: Solve for x
   x = 7,335,334.47/2,640.42
6. Step 6: Final answer
   x = 2,778.09