Finding the Fourth Proportional to 21,917.22, 30,259.89 and 19,555.26

Step by Step Solution

1. Step 1: Write the proportion equation
   21,917.22 : 30,259.89 = 19,555.26 : x
2. Step 2: Convert to fraction form
   21,917.22/30,259.89 = 19,555.26/x
3. Step 3: Cross multiply
   21,917.22x = 30,259.89 × 19,555.26
4. Step 4: Simplify right side
   21,917.22x = 591,740,016.52
5. Step 5: Solve for x
   x = 591,740,016.52/21,917.22
6. Step 6: Final answer
   x = 26,998.86