Finding the Fourth Proportional to 3,728.32, 5,142.72 and 2,842.24

Step by Step Solution

1. Step 1: Write the proportion equation
   3,728.32 : 5,142.72 = 2,842.24 : x
2. Step 2: Convert to fraction form
   3,728.32/5,142.72 = 2,842.24/x
3. Step 3: Cross multiply
   3,728.32x = 5,142.72 × 2,842.24
4. Step 4: Simplify right side
   3,728.32x = 14,616,844.49
5. Step 5: Solve for x
   x = 14,616,844.49/3,728.32
6. Step 6: Final answer
   x = 3,920.49