Finding the Fourth Proportional to 4,111.78, 5,661.82 and 3,447.48

Step by Step Solution

1. Step 1: Write the proportion equation
   4,111.78 : 5,661.82 = 3,447.48 : x
2. Step 2: Convert to fraction form
   4,111.78/5,661.82 = 3,447.48/x
3. Step 3: Cross multiply
   4,111.78x = 5,661.82 × 3,447.48
4. Step 4: Simplify right side
   4,111.78x = 19,519,011.21
5. Step 5: Solve for x
   x = 19,519,011.21/4,111.78
6. Step 6: Final answer
   x = 4,747.10