Finding the Fourth Proportional to 7,856.91, 10,843.20 and 4,320.72

Step by Step Solution

1. Step 1: Write the proportion equation
   7,856.91 : 10,843.20 = 4,320.72 : x
2. Step 2: Convert to fraction form
   7,856.91/10,843.20 = 4,320.72/x
3. Step 3: Cross multiply
   7,856.91x = 10,843.20 × 4,320.72
4. Step 4: Simplify right side
   7,856.91x = 46,850,431.10
5. Step 5: Solve for x
   x = 46,850,431.10/7,856.91
6. Step 6: Final answer
   x = 5,962.96