Finding the Fourth Proportional to 7,828.42, 10,803.72 and 5,171.17

Step by Step Solution

1. Step 1: Write the proportion equation
   7,828.42 : 10,803.72 = 5,171.17 : x
2. Step 2: Convert to fraction form
   7,828.42/10,803.72 = 5,171.17/x
3. Step 3: Cross multiply
   7,828.42x = 10,803.72 × 5,171.17
4. Step 4: Simplify right side
   7,828.42x = 55,867,872.75
5. Step 5: Solve for x
   x = 55,867,872.75/7,828.42
6. Step 6: Final answer
   x = 7,136.55