Finding the Fourth Proportional to 8,321.20, 11,469.56 and 5,899.37

Step by Step Solution

1. Step 1: Write the proportion equation
   8,321.20 : 11,469.56 = 5,899.37 : x
2. Step 2: Convert to fraction form
   8,321.20/11,469.56 = 5,899.37/x
3. Step 3: Cross multiply
   8,321.20x = 11,469.56 × 5,899.37
4. Step 4: Simplify right side
   8,321.20x = 67,663,113.46
5. Step 5: Solve for x
   x = 67,663,113.46/8,321.20
6. Step 6: Final answer
   x = 8,131.41