Finding the Fourth Proportional to 3,443.21, 5,163.22 and 1,102.78

Step by Step Solution

1. Step 1: Write the proportion equation
   3,443.21 : 5,163.22 = 1,102.78 : x
2. Step 2: Convert to fraction form
   3,443.21/5,163.22 = 1,102.78/x
3. Step 3: Cross multiply
   3,443.21x = 5,163.22 × 1,102.78
4. Step 4: Simplify right side
   3,443.21x = 5,693,864.42
5. Step 5: Solve for x
   x = 5,693,864.42/3,443.21
6. Step 6: Final answer
   x = 1,653.65