Finding the Fourth Proportional to 11,856.62, 17,790.09 and 5,621

Step by Step Solution

1. Step 1: Write the proportion equation
   11,856.62 : 17,790.09 = 5,621 : x
2. Step 2: Convert to fraction form
   11,856.62/17,790.09 = 5,621/x
3. Step 3: Cross multiply
   11,856.62x = 17,790.09 × 5,621
4. Step 4: Simplify right side
   11,856.62x = 99,998,095.89
5. Step 5: Solve for x
   x = 99,998,095.89/11,856.62
6. Step 6: Final answer
   x = 8,433.95