Finding the Fourth Proportional to 9,647.20, 13,312.56 and 5,668.12

Step by Step Solution

1. Step 1: Write the proportion equation
   9,647.20 : 13,312.56 = 5,668.12 : x
2. Step 2: Convert to fraction form
   9,647.20/13,312.56 = 5,668.12/x
3. Step 3: Cross multiply
   9,647.20x = 13,312.56 × 5,668.12
4. Step 4: Simplify right side
   9,647.20x = 75,457,187.59
5. Step 5: Solve for x
   x = 75,457,187.59/9,647.20
6. Step 6: Final answer
   x = 7,821.67