Finding the Fourth Proportional to 7,143.57, 10,694.61 and 5,395.86

Step by Step Solution

1. Step 1: Write the proportion equation
   7,143.57 : 10,694.61 = 5,395.86 : x
2. Step 2: Convert to fraction form
   7,143.57/10,694.61 = 5,395.86/x
3. Step 3: Cross multiply
   7,143.57x = 10,694.61 × 5,395.86
4. Step 4: Simplify right side
   7,143.57x = 57,706,618.31
5. Step 5: Solve for x
   x = 57,706,618.31/7,143.57
6. Step 6: Final answer
   x = 8,078.12