Finding the Fourth Proportional to 16,771.72, 25,153.08 and 7,989.16

Step by Step Solution

1. Step 1: Write the proportion equation
   16,771.72 : 25,153.08 = 7,989.16 : x
2. Step 2: Convert to fraction form
   16,771.72/25,153.08 = 7,989.16/x
3. Step 3: Cross multiply
   16,771.72x = 25,153.08 × 7,989.16
4. Step 4: Simplify right side
   16,771.72x = 200,951,980.61
5. Step 5: Solve for x
   x = 200,951,980.61/16,771.72
6. Step 6: Final answer
   x = 11,981.60