Finding the Fourth Proportional to 22,905.72, 31,610.52 and 12,833.96

Step by Step Solution

1. Step 1: Write the proportion equation
   22,905.72 : 31,610.52 = 12,833.96 : x
2. Step 2: Convert to fraction form
   22,905.72/31,610.52 = 12,833.96/x
3. Step 3: Cross multiply
   22,905.72x = 31,610.52 × 12,833.96
4. Step 4: Simplify right side
   22,905.72x = 405,687,991.21
5. Step 5: Solve for x
   x = 405,687,991.21/22,905.72
6. Step 6: Final answer
   x = 17,711.21