Finding the Fourth Proportional to 22,811.16, 31,472.01 and 12,738

Step by Step Solution

1. Step 1: Write the proportion equation
   22,811.16 : 31,472.01 = 12,738 : x
2. Step 2: Convert to fraction form
   22,811.16/31,472.01 = 12,738/x
3. Step 3: Cross multiply
   22,811.16x = 31,472.01 × 12,738
4. Step 4: Simplify right side
   22,811.16x = 400,890,463.38
5. Step 5: Solve for x
   x = 400,890,463.38/22,811.16
6. Step 6: Final answer
   x = 17,574.31