Finding the Fourth Proportional to 21,724.71, 32,404.41 and 19,731.51

Step by Step Solution

1. Step 1: Write the proportion equation
   21,724.71 : 32,404.41 = 19,731.51 : x
2. Step 2: Convert to fraction form
   21,724.71/32,404.41 = 19,731.51/x
3. Step 3: Cross multiply
   21,724.71x = 32,404.41 × 19,731.51
4. Step 4: Simplify right side
   21,724.71x = 639,387,939.96
5. Step 5: Solve for x
   x = 639,387,939.96/21,724.71
6. Step 6: Final answer
   x = 29,431.37