Finding the Fourth Proportional to 3,676.18, 5,541.81 and 3,431.78

Step by Step Solution

1. Step 1: Write the proportion equation
   3,676.18 : 5,541.81 = 3,431.78 : x
2. Step 2: Convert to fraction form
   3,676.18/5,541.81 = 3,431.78/x
3. Step 3: Cross multiply
   3,676.18x = 5,541.81 × 3,431.78
4. Step 4: Simplify right side
   3,676.18x = 19,018,272.72
5. Step 5: Solve for x
   x = 19,018,272.72/3,676.18
6. Step 6: Final answer
   x = 5,173.38