Finding the Fourth Proportional to 9,286.28, 12,812.82 and 5,253.18

Step by Step Solution

1. Step 1: Write the proportion equation
   9,286.28 : 12,812.82 = 5,253.18 : x
2. Step 2: Convert to fraction form
   9,286.28/12,812.82 = 5,253.18/x
3. Step 3: Cross multiply
   9,286.28x = 12,812.82 × 5,253.18
4. Step 4: Simplify right side
   9,286.28x = 67,308,049.77
5. Step 5: Solve for x
   x = 67,308,049.77/9,286.28
6. Step 6: Final answer
   x = 7,248.12