Finding the Fourth Proportional to 9,328.56, 12,876.12 and 7,453.20

Step by Step Solution

1. Step 1: Write the proportion equation
   9,328.56 : 12,876.12 = 7,453.20 : x
2. Step 2: Convert to fraction form
   9,328.56/12,876.12 = 7,453.20/x
3. Step 3: Cross multiply
   9,328.56x = 12,876.12 × 7,453.20
4. Step 4: Simplify right side
   9,328.56x = 95,968,297.58
5. Step 5: Solve for x
   x = 95,968,297.58/9,328.56
6. Step 6: Final answer
   x = 10,287.58