Finding the Fourth Proportional to 9,856.19, 13,601.83 and 5,380.23

Step by Step Solution

1. Step 1: Write the proportion equation
   9,856.19 : 13,601.83 = 5,380.23 : x
2. Step 2: Convert to fraction form
   9,856.19/13,601.83 = 5,380.23/x
3. Step 3: Cross multiply
   9,856.19x = 13,601.83 × 5,380.23
4. Step 4: Simplify right side
   9,856.19x = 73,180,960.37
5. Step 5: Solve for x
   x = 73,180,960.37/9,856.19
6. Step 6: Final answer
   x = 7,424.87