Finding the Fourth Proportional to 16,314.96, 24,469.20 and 7,991.40

Step by Step Solution

1. Step 1: Write the proportion equation
   16,314.96 : 24,469.20 = 7,991.40 : x
2. Step 2: Convert to fraction form
   16,314.96/24,469.20 = 7,991.40/x
3. Step 3: Cross multiply
   16,314.96x = 24,469.20 × 7,991.40
4. Step 4: Simplify right side
   16,314.96x = 195,543,164.88
5. Step 5: Solve for x
   x = 195,543,164.88/16,314.96
6. Step 6: Final answer
   x = 11,985.51