Finding the Fourth Proportional to 3,431.41, 5,147.06 and 1,091.38

Step by Step Solution

1. Step 1: Write the proportion equation
   3,431.41 : 5,147.06 = 1,091.38 : x
2. Step 2: Convert to fraction form
   3,431.41/5,147.06 = 1,091.38/x
3. Step 3: Cross multiply
   3,431.41x = 5,147.06 × 1,091.38
4. Step 4: Simplify right side
   3,431.41x = 5,617,410.72
5. Step 5: Solve for x
   x = 5,617,410.72/3,431.41
6. Step 6: Final answer
   x = 1,637.06