Finding the Fourth Proportional to 9,288.42, 12,816.12 and 5,310.87

Step by Step Solution

1. Step 1: Write the proportion equation
   9,288.42 : 12,816.12 = 5,310.87 : x
2. Step 2: Convert to fraction form
   9,288.42/12,816.12 = 5,310.87/x
3. Step 3: Cross multiply
   9,288.42x = 12,816.12 × 5,310.87
4. Step 4: Simplify right side
   9,288.42x = 68,064,747.22
5. Step 5: Solve for x
   x = 68,064,747.22/9,288.42
6. Step 6: Final answer
   x = 7,327.91