Finding the Fourth Proportional to 7,822.72, 10,792.32 and 5,171.68

Step by Step Solution

1. Step 1: Write the proportion equation
   7,822.72 : 10,792.32 = 5,171.68 : x
2. Step 2: Convert to fraction form
   7,822.72/10,792.32 = 5,171.68/x
3. Step 3: Cross multiply
   7,822.72x = 10,792.32 × 5,171.68
4. Step 4: Simplify right side
   7,822.72x = 55,814,425.50
5. Step 5: Solve for x
   x = 55,814,425.50/7,822.72
6. Step 6: Final answer
   x = 7,134.91