Finding the Fourth Proportional to 22,259.31, 33,365.89 and 13,920.18

Step by Step Solution

1. Step 1: Write the proportion equation
   22,259.31 : 33,365.89 = 13,920.18 : x
2. Step 2: Convert to fraction form
   22,259.31/33,365.89 = 13,920.18/x
3. Step 3: Cross multiply
   22,259.31x = 33,365.89 × 13,920.18
4. Step 4: Simplify right side
   22,259.31x = 464,459,194.66
5. Step 5: Solve for x
   x = 464,459,194.66/22,259.31
6. Step 6: Final answer
   x = 20,865.84