Finding the Fourth Proportional to 72,471.37, 108,707.89 and 21,870.83

Step by Step Solution

1. Step 1: Write the proportion equation
   72,471.37 : 108,707.89 = 21,870.83 : x
2. Step 2: Convert to fraction form
   72,471.37/108,707.89 = 21,870.83/x
3. Step 3: Cross multiply
   72,471.37x = 108,707.89 × 21,870.83
4. Step 4: Simplify right side
   72,471.37x = 2,377,531,781.85
5. Step 5: Solve for x
   x = 2,377,531,781.85/72,471.37
6. Step 6: Final answer
   x = 32,806.50