Finding the Fourth Proportional to 16,866.61, 23,274.72 and 9,311.72

Step by Step Solution

1. Step 1: Write the proportion equation
   16,866.61 : 23,274.72 = 9,311.72 : x
2. Step 2: Convert to fraction form
   16,866.61/23,274.72 = 9,311.72/x
3. Step 3: Cross multiply
   16,866.61x = 23,274.72 × 9,311.72
4. Step 4: Simplify right side
   16,866.61x = 216,727,675.72
5. Step 5: Solve for x
   x = 216,727,675.72/16,866.61
6. Step 6: Final answer
   x = 12,849.51