Finding the Fourth Proportional to 7,143.40, 9,859.06 and 4,271.94

Step by Step Solution

1. Step 1: Write the proportion equation
   7,143.40 : 9,859.06 = 4,271.94 : x
2. Step 2: Convert to fraction form
   7,143.40/9,859.06 = 4,271.94/x
3. Step 3: Cross multiply
   7,143.40x = 9,859.06 × 4,271.94
4. Step 4: Simplify right side
   7,143.40x = 42,117,312.78
5. Step 5: Solve for x
   x = 42,117,312.78/7,143.40
6. Step 6: Final answer
   x = 5,895.98