Finding the Fourth Proportional to 4,086.80, 6,131.22 and 1,165.10

Step by Step Solution

1. Step 1: Write the proportion equation
   4,086.80 : 6,131.22 = 1,165.10 : x
2. Step 2: Convert to fraction form
   4,086.80/6,131.22 = 1,165.10/x
3. Step 3: Cross multiply
   4,086.80x = 6,131.22 × 1,165.10
4. Step 4: Simplify right side
   4,086.80x = 7,143,499.75
5. Step 5: Solve for x
   x = 7,143,499.75/4,086.80
6. Step 6: Final answer
   x = 1,747.95