Finding the Fourth Proportional to 16,865.23, 23,274.05 and 9,311.57

Step by Step Solution

1. Step 1: Write the proportion equation
   16,865.23 : 23,274.05 = 9,311.57 : x
2. Step 2: Convert to fraction form
   16,865.23/23,274.05 = 9,311.57/x
3. Step 3: Cross multiply
   16,865.23x = 23,274.05 × 9,311.57
4. Step 4: Simplify right side
   16,865.23x = 216,717,899.20
5. Step 5: Solve for x
   x = 216,717,899.20/16,865.23
6. Step 6: Final answer
   x = 12,849.99