Finding the Fourth Proportional to 11,821.34, 16,315.26 and 8,984.10

Step by Step Solution

1. Step 1: Write the proportion equation
   11,821.34 : 16,315.26 = 8,984.10 : x
2. Step 2: Convert to fraction form
   11,821.34/16,315.26 = 8,984.10/x
3. Step 3: Cross multiply
   11,821.34x = 16,315.26 × 8,984.10
4. Step 4: Simplify right side
   11,821.34x = 146,577,927.37
5. Step 5: Solve for x
   x = 146,577,927.37/11,821.34
6. Step 6: Final answer
   x = 12,399.43