Finding the Fourth Proportional to 23,059.75, 31,819.05 and 12,986.18

Step by Step Solution

1. Step 1: Write the proportion equation
   23,059.75 : 31,819.05 = 12,986.18 : x
2. Step 2: Convert to fraction form
   23,059.75/31,819.05 = 12,986.18/x
3. Step 3: Cross multiply
   23,059.75x = 31,819.05 × 12,986.18
4. Step 4: Simplify right side
   23,059.75x = 413,207,910.73
5. Step 5: Solve for x
   x = 413,207,910.73/23,059.75
6. Step 6: Final answer
   x = 17,919.01