Finding the Fourth Proportional to 9,287.82, 12,817.86 and 5,310.18

Step by Step Solution

1. Step 1: Write the proportion equation
   9,287.82 : 12,817.86 = 5,310.18 : x
2. Step 2: Convert to fraction form
   9,287.82/12,817.86 = 5,310.18/x
3. Step 3: Cross multiply
   9,287.82x = 12,817.86 × 5,310.18
4. Step 4: Simplify right side
   9,287.82x = 68,065,143.81
5. Step 5: Solve for x
   x = 68,065,143.81/9,287.82
6. Step 6: Final answer
   x = 7,328.43