Finding the Fourth Proportional to 9,676.19, 13,353.67 and 5,428.59

Step by Step Solution

1. Step 1: Write the proportion equation
   9,676.19 : 13,353.67 = 5,428.59 : x
2. Step 2: Convert to fraction form
   9,676.19/13,353.67 = 5,428.59/x
3. Step 3: Cross multiply
   9,676.19x = 13,353.67 × 5,428.59
4. Step 4: Simplify right side
   9,676.19x = 72,491,653.54
5. Step 5: Solve for x
   x = 72,491,653.54/9,676.19
6. Step 6: Final answer
   x = 7,491.76