Finding the Fourth Proportional to 3,345.78, 5,019.84 and 1,037.28

Step by Step Solution

1. Step 1: Write the proportion equation
   3,345.78 : 5,019.84 = 1,037.28 : x
2. Step 2: Convert to fraction form
   3,345.78/5,019.84 = 1,037.28/x
3. Step 3: Cross multiply
   3,345.78x = 5,019.84 × 1,037.28
4. Step 4: Simplify right side
   3,345.78x = 5,206,979.64
5. Step 5: Solve for x
   x = 5,206,979.64/3,345.78
6. Step 6: Final answer
   x = 1,556.28