Finding the Fourth Proportional to 16,859.67, 23,243.85 and 12,086.55

Step by Step Solution

1. Step 1: Write the proportion equation
   16,859.67 : 23,243.85 = 12,086.55 : x
2. Step 2: Convert to fraction form
   16,859.67/23,243.85 = 12,086.55/x
3. Step 3: Cross multiply
   16,859.67x = 23,243.85 × 12,086.55
4. Step 4: Simplify right side
   16,859.67x = 280,937,955.22
5. Step 5: Solve for x
   x = 280,937,955.22/16,859.67
6. Step 6: Final answer
   x = 16,663.31