Finding the Fourth Proportional to 3,380.72, 5,071.28 and 1,072.24

Step by Step Solution

1. Step 1: Write the proportion equation
   3,380.72 : 5,071.28 = 1,072.24 : x
2. Step 2: Convert to fraction form
   3,380.72/5,071.28 = 1,072.24/x
3. Step 3: Cross multiply
   3,380.72x = 5,071.28 × 1,072.24
4. Step 4: Simplify right side
   3,380.72x = 5,437,629.27
5. Step 5: Solve for x
   x = 5,437,629.27/3,380.72
6. Step 6: Final answer
   x = 1,608.42