Finding the Fourth Proportional to 7,867.91, 10,857.72 and 4,331.10

Step by Step Solution

1. Step 1: Write the proportion equation
   7,867.91 : 10,857.72 = 4,331.10 : x
2. Step 2: Convert to fraction form
   7,867.91/10,857.72 = 4,331.10/x
3. Step 3: Cross multiply
   7,867.91x = 10,857.72 × 4,331.10
4. Step 4: Simplify right side
   7,867.91x = 47,025,795.15
5. Step 5: Solve for x
   x = 47,025,795.15/7,867.91
6. Step 6: Final answer
   x = 5,976.91