Finding the Fourth Proportional to 2,428.57, 3,643.16 and 1,112.73

Step by Step Solution

1. Step 1: Write the proportion equation
   2,428.57 : 3,643.16 = 1,112.73 : x
2. Step 2: Convert to fraction form
   2,428.57/3,643.16 = 1,112.73/x
3. Step 3: Cross multiply
   2,428.57x = 3,643.16 × 1,112.73
4. Step 4: Simplify right side
   2,428.57x = 4,053,853.43
5. Step 5: Solve for x
   x = 4,053,853.43/2,428.57
6. Step 6: Final answer
   x = 1,669.23