Finding the Fourth Proportional to 22,815.72, 31,485.74 and 12,744.14

Step by Step Solution

1. Step 1: Write the proportion equation
   22,815.72 : 31,485.74 = 12,744.14 : x
2. Step 2: Convert to fraction form
   22,815.72/31,485.74 = 12,744.14/x
3. Step 3: Cross multiply
   22,815.72x = 31,485.74 × 12,744.14
4. Step 4: Simplify right side
   22,815.72x = 401,258,457.41
5. Step 5: Solve for x
   x = 401,258,457.41/22,815.72
6. Step 6: Final answer
   x = 17,586.93