Finding the Fourth Proportional to 16,872.84, 23,284.31 and 9,319.50

Step by Step Solution

1. Step 1: Write the proportion equation
   16,872.84 : 23,284.31 = 9,319.50 : x
2. Step 2: Convert to fraction form
   16,872.84/23,284.31 = 9,319.50/x
3. Step 3: Cross multiply
   16,872.84x = 23,284.31 × 9,319.50
4. Step 4: Simplify right side
   16,872.84x = 216,998,080.45
5. Step 5: Solve for x
   x = 216,998,080.45/16,872.84
6. Step 6: Final answer
   x = 12,860.79