Finding the Fourth Proportional to 8,940.16, 12,328.38 and 5,401.36

Step by Step Solution

1. Step 1: Write the proportion equation
   8,940.16 : 12,328.38 = 5,401.36 : x
2. Step 2: Convert to fraction form
   8,940.16/12,328.38 = 5,401.36/x
3. Step 3: Cross multiply
   8,940.16x = 12,328.38 × 5,401.36
4. Step 4: Simplify right side
   8,940.16x = 66,590,018.60
5. Step 5: Solve for x
   x = 66,590,018.60/8,940.16
6. Step 6: Final answer
   x = 7,448.41