Finding the Fourth Proportional to 31,226.73, 43,105.71 and 21,168.96

Step by Step Solution

1. Step 1: Write the proportion equation
   31,226.73 : 43,105.71 = 21,168.96 : x
2. Step 2: Convert to fraction form
   31,226.73/43,105.71 = 21,168.96/x
3. Step 3: Cross multiply
   31,226.73x = 43,105.71 × 21,168.96
4. Step 4: Simplify right side
   31,226.73x = 912,503,050.76
5. Step 5: Solve for x
   x = 912,503,050.76/31,226.73
6. Step 6: Final answer
   x = 29,221.86