Finding the Fourth Proportional to 9,856.05, 13,600.87 and 5,379.69

Step by Step Solution

1. Step 1: Write the proportion equation
   9,856.05 : 13,600.87 = 5,379.69 : x
2. Step 2: Convert to fraction form
   9,856.05/13,600.87 = 5,379.69/x
3. Step 3: Cross multiply
   9,856.05x = 13,600.87 × 5,379.69
4. Step 4: Simplify right side
   9,856.05x = 73,168,464.33
5. Step 5: Solve for x
   x = 73,168,464.33/9,856.05
6. Step 6: Final answer
   x = 7,423.71