Finding the Fourth Proportional to 9,558.43, 13,190.72 and 5,578.77

Step by Step Solution

1. Step 1: Write the proportion equation
   9,558.43 : 13,190.72 = 5,578.77 : x
2. Step 2: Convert to fraction form
   9,558.43/13,190.72 = 5,578.77/x
3. Step 3: Cross multiply
   9,558.43x = 13,190.72 × 5,578.77
4. Step 4: Simplify right side
   9,558.43x = 73,587,993.01
5. Step 5: Solve for x
   x = 73,587,993.01/9,558.43
6. Step 6: Final answer
   x = 7,698.75