Finding the Fourth Proportional to 5,786.20, 8,674.24 and 3,931.30

Step by Step Solution

1. Step 1: Write the proportion equation
   5,786.20 : 8,674.24 = 3,931.30 : x
2. Step 2: Convert to fraction form
   5,786.20/8,674.24 = 3,931.30/x
3. Step 3: Cross multiply
   5,786.20x = 8,674.24 × 3,931.30
4. Step 4: Simplify right side
   5,786.20x = 34,101,039.71
5. Step 5: Solve for x
   x = 34,101,039.71/5,786.20
6. Step 6: Final answer
   x = 5,893.51