Finding the Fourth Proportional to 9,559.86, 13,192.17 and 5,311.20

Step by Step Solution

1. Step 1: Write the proportion equation
   9,559.86 : 13,192.17 = 5,311.20 : x
2. Step 2: Convert to fraction form
   9,559.86/13,192.17 = 5,311.20/x
3. Step 3: Cross multiply
   9,559.86x = 13,192.17 × 5,311.20
4. Step 4: Simplify right side
   9,559.86x = 70,066,233.39
5. Step 5: Solve for x
   x = 70,066,233.39/9,559.86
6. Step 6: Final answer
   x = 7,329.21