Finding the Fourth Proportional to 9,428.18, 13,011.46 and 5,236.42

Step by Step Solution

1. Step 1: Write the proportion equation
   9,428.18 : 13,011.46 = 5,236.42 : x
2. Step 2: Convert to fraction form
   9,428.18/13,011.46 = 5,236.42/x
3. Step 3: Cross multiply
   9,428.18x = 13,011.46 × 5,236.42
4. Step 4: Simplify right side
   9,428.18x = 68,133,469.37
5. Step 5: Solve for x
   x = 68,133,469.37/9,428.18
6. Step 6: Final answer
   x = 7,226.58