Finding the Fourth Proportional to 7,142.72, 9,859.55 and 5,814.12

Step by Step Solution

1. Step 1: Write the proportion equation
   7,142.72 : 9,859.55 = 5,814.12 : x
2. Step 2: Convert to fraction form
   7,142.72/9,859.55 = 5,814.12/x
3. Step 3: Cross multiply
   7,142.72x = 9,859.55 × 5,814.12
4. Step 4: Simplify right side
   7,142.72x = 57,324,577.78
5. Step 5: Solve for x
   x = 57,324,577.78/7,142.72
6. Step 6: Final answer
   x = 8,025.59