Finding the Fourth Proportional to 72,145.37, 108,228.82 and 22,221.29

Step by Step Solution

1. Step 1: Write the proportion equation
   72,145.37 : 108,228.82 = 22,221.29 : x
2. Step 2: Convert to fraction form
   72,145.37/108,228.82 = 22,221.29/x
3. Step 3: Cross multiply
   72,145.37x = 108,228.82 × 22,221.29
4. Step 4: Simplify right side
   72,145.37x = 2,404,983,674.72
5. Step 5: Solve for x
   x = 2,404,983,674.72/72,145.37
6. Step 6: Final answer
   x = 33,335.25