Finding the Fourth Proportional to 21,422.21, 32,077.42 and 17,239.37

Step by Step Solution

1. Step 1: Write the proportion equation
   21,422.21 : 32,077.42 = 17,239.37 : x
2. Step 2: Convert to fraction form
   21,422.21/32,077.42 = 17,239.37/x
3. Step 3: Cross multiply
   21,422.21x = 32,077.42 × 17,239.37
4. Step 4: Simplify right side
   21,422.21x = 552,994,308.54
5. Step 5: Solve for x
   x = 552,994,308.54/21,422.21
6. Step 6: Final answer
   x = 25,814.07