Finding the Fourth Proportional to 19,687.72, 29,311.97 and 19,411.96

Step by Step Solution

1. Step 1: Write the proportion equation
   19,687.72 : 29,311.97 = 19,411.96 : x
2. Step 2: Convert to fraction form
   19,687.72/29,311.97 = 19,411.96/x
3. Step 3: Cross multiply
   19,687.72x = 29,311.97 × 19,411.96
4. Step 4: Simplify right side
   19,687.72x = 569,002,789.16
5. Step 5: Solve for x
   x = 569,002,789.16/19,687.72
6. Step 6: Final answer
   x = 28,901.41