Finding the Fourth Proportional to 16,065.56, 22,171.86 and 8,991.88

Step by Step Solution

1. Step 1: Write the proportion equation
   16,065.56 : 22,171.86 = 8,991.88 : x
2. Step 2: Convert to fraction form
   16,065.56/22,171.86 = 8,991.88/x
3. Step 3: Cross multiply
   16,065.56x = 22,171.86 × 8,991.88
4. Step 4: Simplify right side
   16,065.56x = 199,366,704.50
5. Step 5: Solve for x
   x = 199,366,704.50/16,065.56
6. Step 6: Final answer
   x = 12,409.57