Finding the Fourth Proportional to 9,676.06, 13,353.12 and 5,428.07

Step by Step Solution

1. Step 1: Write the proportion equation
   9,676.06 : 13,353.12 = 5,428.07 : x
2. Step 2: Convert to fraction form
   9,676.06/13,353.12 = 5,428.07/x
3. Step 3: Cross multiply
   9,676.06x = 13,353.12 × 5,428.07
4. Step 4: Simplify right side
   9,676.06x = 72,481,653.39
5. Step 5: Solve for x
   x = 72,481,653.39/9,676.06
6. Step 6: Final answer
   x = 7,490.82