Finding the Fourth Proportional to 9,321.38, 12,868.98 and 5,786.54

Step by Step Solution

1. Step 1: Write the proportion equation
   9,321.38 : 12,868.98 = 5,786.54 : x
2. Step 2: Convert to fraction form
   9,321.38/12,868.98 = 5,786.54/x
3. Step 3: Cross multiply
   9,321.38x = 12,868.98 × 5,786.54
4. Step 4: Simplify right side
   9,321.38x = 74,466,867.53
5. Step 5: Solve for x
   x = 74,466,867.53/9,321.38
6. Step 6: Final answer
   x = 7,988.82