Finding the Fourth Proportional to 16,869.83, 23,279.31 and 9,315.96

Step by Step Solution

1. Step 1: Write the proportion equation
   16,869.83 : 23,279.31 = 9,315.96 : x
2. Step 2: Convert to fraction form
   16,869.83/23,279.31 = 9,315.96/x
3. Step 3: Cross multiply
   16,869.83x = 23,279.31 × 9,315.96
4. Step 4: Simplify right side
   16,869.83x = 216,869,120.79
5. Step 5: Solve for x
   x = 216,869,120.79/16,869.83
6. Step 6: Final answer
   x = 12,855.45