Finding the Fourth Proportional to 7,940.16, 10,956.32 and 5,289.28

Step by Step Solution

1. Step 1: Write the proportion equation
   7,940.16 : 10,956.32 = 5,289.28 : x
2. Step 2: Convert to fraction form
   7,940.16/10,956.32 = 5,289.28/x
3. Step 3: Cross multiply
   7,940.16x = 10,956.32 × 5,289.28
4. Step 4: Simplify right side
   7,940.16x = 57,951,044.25
5. Step 5: Solve for x
   x = 57,951,044.25/7,940.16
6. Step 6: Final answer
   x = 7,298.47