Finding the Fourth Proportional to 6,131.80, 8,464.49 and 4,145.05

Step by Step Solution

1. Step 1: Write the proportion equation
   6,131.80 : 8,464.49 = 4,145.05 : x
2. Step 2: Convert to fraction form
   6,131.80/8,464.49 = 4,145.05/x
3. Step 3: Cross multiply
   6,131.80x = 8,464.49 × 4,145.05
4. Step 4: Simplify right side
   6,131.80x = 35,085,734.27
5. Step 5: Solve for x
   x = 35,085,734.27/6,131.80
6. Step 6: Final answer
   x = 5,721.93