Finding the Fourth Proportional to 21,766.91, 30,037.91 and 12,693.96

Step by Step Solution

1. Step 1: Write the proportion equation
   21,766.91 : 30,037.91 = 12,693.96 : x
2. Step 2: Convert to fraction form
   21,766.91/30,037.91 = 12,693.96/x
3. Step 3: Cross multiply
   21,766.91x = 30,037.91 × 12,693.96
4. Step 4: Simplify right side
   21,766.91x = 381,299,964.55
5. Step 5: Solve for x
   x = 381,299,964.55/21,766.91
6. Step 6: Final answer
   x = 17,517.42