Finding the Fourth Proportional to 13,020.27, 19,531.41 and 3,661.05

Step by Step Solution

1. Step 1: Write the proportion equation
   13,020.27 : 19,531.41 = 3,661.05 : x
2. Step 2: Convert to fraction form
   13,020.27/19,531.41 = 3,661.05/x
3. Step 3: Cross multiply
   13,020.27x = 19,531.41 × 3,661.05
4. Step 4: Simplify right side
   13,020.27x = 71,505,468.58
5. Step 5: Solve for x
   x = 71,505,468.58/13,020.27
6. Step 6: Final answer
   x = 5,491.86