Finding the Fourth Proportional to 22,815.42, 31,484.93 and 12,744

Step by Step Solution

1. Step 1: Write the proportion equation
   22,815.42 : 31,484.93 = 12,744 : x
2. Step 2: Convert to fraction form
   22,815.42/31,484.93 = 12,744/x
3. Step 3: Cross multiply
   22,815.42x = 31,484.93 × 12,744
4. Step 4: Simplify right side
   22,815.42x = 401,243,884.20
5. Step 5: Solve for x
   x = 401,243,884.20/22,815.42
6. Step 6: Final answer
   x = 17,586.52