Finding the Fourth Proportional to 7,142.79, 10,712.12 and 2,144.96

Step by Step Solution

1. Step 1: Write the proportion equation
   7,142.79 : 10,712.12 = 2,144.96 : x
2. Step 2: Convert to fraction form
   7,142.79/10,712.12 = 2,144.96/x
3. Step 3: Cross multiply
   7,142.79x = 10,712.12 × 2,144.96
4. Step 4: Simplify right side
   7,142.79x = 22,977,064.89
5. Step 5: Solve for x
   x = 22,977,064.89/7,142.79
6. Step 6: Final answer
   x = 3,216.82