Finding the Fourth Proportional to 5,514.89, 8,266.86 and 3,661.40

Step by Step Solution

1. Step 1: Write the proportion equation
   5,514.89 : 8,266.86 = 3,661.40 : x
2. Step 2: Convert to fraction form
   5,514.89/8,266.86 = 3,661.40/x
3. Step 3: Cross multiply
   5,514.89x = 8,266.86 × 3,661.40
4. Step 4: Simplify right side
   5,514.89x = 30,268,301.87
5. Step 5: Solve for x
   x = 30,268,301.87/5,514.89
6. Step 6: Final answer
   x = 5,488.47