Finding the Fourth Proportional to 9,321.62, 12,882.24 and 7,640.33

Step by Step Solution

1. Step 1: Write the proportion equation
   9,321.62 : 12,882.24 = 7,640.33 : x
2. Step 2: Convert to fraction form
   9,321.62/12,882.24 = 7,640.33/x
3. Step 3: Cross multiply
   9,321.62x = 12,882.24 × 7,640.33
4. Step 4: Simplify right side
   9,321.62x = 98,424,500.33
5. Step 5: Solve for x
   x = 98,424,500.33/9,321.62
6. Step 6: Final answer
   x = 10,558.74