Finding the Fourth Proportional to 9,287.69, 12,816.90 and 5,308.56

Step by Step Solution

1. Step 1: Write the proportion equation
   9,287.69 : 12,816.90 = 5,308.56 : x
2. Step 2: Convert to fraction form
   9,287.69/12,816.90 = 5,308.56/x
3. Step 3: Cross multiply
   9,287.69x = 12,816.90 × 5,308.56
4. Step 4: Simplify right side
   9,287.69x = 68,039,282.66
5. Step 5: Solve for x
   x = 68,039,282.66/9,287.69
6. Step 6: Final answer
   x = 7,325.75