Finding the Fourth Proportional to 10,821.54, 16,222.56 and 5,611.62

Step by Step Solution

1. Step 1: Write the proportion equation
   10,821.54 : 16,222.56 = 5,611.62 : x
2. Step 2: Convert to fraction form
   10,821.54/16,222.56 = 5,611.62/x
3. Step 3: Cross multiply
   10,821.54x = 16,222.56 × 5,611.62
4. Step 4: Simplify right side
   10,821.54x = 91,034,842.15
5. Step 5: Solve for x
   x = 91,034,842.15/10,821.54
6. Step 6: Final answer
   x = 8,412.37