Finding the Fourth Proportional to 6,161.67, 8,499.74 and 3,919.59

Step by Step Solution

1. Step 1: Write the proportion equation
   6,161.67 : 8,499.74 = 3,919.59 : x
2. Step 2: Convert to fraction form
   6,161.67/8,499.74 = 3,919.59/x
3. Step 3: Cross multiply
   6,161.67x = 8,499.74 × 3,919.59
4. Step 4: Simplify right side
   6,161.67x = 33,315,476.31
5. Step 5: Solve for x
   x = 33,315,476.31/6,161.67
6. Step 6: Final answer
   x = 5,406.89