Finding the Fourth Proportional to 3,633.36, 5,452.43 and 1,991.06

Step by Step Solution

1. Step 1: Write the proportion equation
   3,633.36 : 5,452.43 = 1,991.06 : x
2. Step 2: Convert to fraction form
   3,633.36/5,452.43 = 1,991.06/x
3. Step 3: Cross multiply
   3,633.36x = 5,452.43 × 1,991.06
4. Step 4: Simplify right side
   3,633.36x = 10,856,078.06
5. Step 5: Solve for x
   x = 10,856,078.06/3,633.36
6. Step 6: Final answer
   x = 2,987.89