Finding the Fourth Proportional to 21,456.54, 32,162.94 and 19,564.80

Step by Step Solution

1. Step 1: Write the proportion equation
   21,456.54 : 32,162.94 = 19,564.80 : x
2. Step 2: Convert to fraction form
   21,456.54/32,162.94 = 19,564.80/x
3. Step 3: Cross multiply
   21,456.54x = 32,162.94 × 19,564.80
4. Step 4: Simplify right side
   21,456.54x = 629,261,488.51
5. Step 5: Solve for x
   x = 629,261,488.51/21,456.54
6. Step 6: Final answer
   x = 29,327.26