Finding the Fourth Proportional to 7,142.72, 10,717.72 and 3,246.64

Step by Step Solution

1. Step 1: Write the proportion equation
   7,142.72 : 10,717.72 = 3,246.64 : x
2. Step 2: Convert to fraction form
   7,142.72/10,717.72 = 3,246.64/x
3. Step 3: Cross multiply
   7,142.72x = 10,717.72 × 3,246.64
4. Step 4: Simplify right side
   7,142.72x = 34,796,578.46
5. Step 5: Solve for x
   x = 34,796,578.46/7,142.72
6. Step 6: Final answer
   x = 4,871.61