Finding the Fourth Proportional to 7,143.91, 10,719.91 and 3,856.93

Step by Step Solution

1. Step 1: Write the proportion equation
   7,143.91 : 10,719.91 = 3,856.93 : x
2. Step 2: Convert to fraction form
   7,143.91/10,719.91 = 3,856.93/x
3. Step 3: Cross multiply
   7,143.91x = 10,719.91 × 3,856.93
4. Step 4: Simplify right side
   7,143.91x = 41,345,942.48
5. Step 5: Solve for x
   x = 41,345,942.48/7,143.91
6. Step 6: Final answer
   x = 5,787.58