Finding the Fourth Proportional to 16,665.81, 24,981.29 and 7,890.27

Step by Step Solution

1. Step 1: Write the proportion equation
   16,665.81 : 24,981.29 = 7,890.27 : x
2. Step 2: Convert to fraction form
   16,665.81/24,981.29 = 7,890.27/x
3. Step 3: Cross multiply
   16,665.81x = 24,981.29 × 7,890.27
4. Step 4: Simplify right side
   16,665.81x = 197,109,123.05
5. Step 5: Solve for x
   x = 197,109,123.05/16,665.81
6. Step 6: Final answer
   x = 11,827.16