Finding the Fourth Proportional to 22,769.94, 31,421.88 and 12,698.67

Step by Step Solution

1. Step 1: Write the proportion equation
   22,769.94 : 31,421.88 = 12,698.67 : x
2. Step 2: Convert to fraction form
   22,769.94/31,421.88 = 12,698.67/x
3. Step 3: Cross multiply
   22,769.94x = 31,421.88 × 12,698.67
4. Step 4: Simplify right side
   22,769.94x = 399,016,084.90
5. Step 5: Solve for x
   x = 399,016,084.90/22,769.94
6. Step 6: Final answer
   x = 17,523.81