Finding the Fourth Proportional to 2,574.12, 3,552.78 and 1,643.16

Step by Step Solution

1. Step 1: Write the proportion equation
   2,574.12 : 3,552.78 = 1,643.16 : x
2. Step 2: Convert to fraction form
   2,574.12/3,552.78 = 1,643.16/x
3. Step 3: Cross multiply
   2,574.12x = 3,552.78 × 1,643.16
4. Step 4: Simplify right side
   2,574.12x = 5,837,785.98
5. Step 5: Solve for x
   x = 5,837,785.98/2,574.12
6. Step 6: Final answer
   x = 2,267.88