Finding the Fourth Proportional to 9,288.09, 12,817.98 and 5,310.45

Step by Step Solution

1. Step 1: Write the proportion equation
   9,288.09 : 12,817.98 = 5,310.45 : x
2. Step 2: Convert to fraction form
   9,288.09/12,817.98 = 5,310.45/x
3. Step 3: Cross multiply
   9,288.09x = 12,817.98 × 5,310.45
4. Step 4: Simplify right side
   9,288.09x = 68,069,241.89
5. Step 5: Solve for x
   x = 68,069,241.89/9,288.09
6. Step 6: Final answer
   x = 7,328.66