Finding the Fourth Proportional to 9,856.28, 13,601.43 and 5,380.22

Step by Step Solution

1. Step 1: Write the proportion equation
   9,856.28 : 13,601.43 = 5,380.22 : x
2. Step 2: Convert to fraction form
   9,856.28/13,601.43 = 5,380.22/x
3. Step 3: Cross multiply
   9,856.28x = 13,601.43 × 5,380.22
4. Step 4: Simplify right side
   9,856.28x = 73,178,719.72
5. Step 5: Solve for x
   x = 73,178,719.72/9,856.28
6. Step 6: Final answer
   x = 7,424.58