Finding the Fourth Proportional to 9,065.70, 13,598.69 and 5,578.05

Step by Step Solution

1. Step 1: Write the proportion equation
   9,065.70 : 13,598.69 = 5,578.05 : x
2. Step 2: Convert to fraction form
   9,065.70/13,598.69 = 5,578.05/x
3. Step 3: Cross multiply
   9,065.70x = 13,598.69 × 5,578.05
4. Step 4: Simplify right side
   9,065.70x = 75,854,144.86
5. Step 5: Solve for x
   x = 75,854,144.86/9,065.70
6. Step 6: Final answer
   x = 8,367.16