Finding the Fourth Proportional to 30,859.37, 42,585.83 and 16,712.21

Step by Step Solution

1. Step 1: Write the proportion equation
   30,859.37 : 42,585.83 = 16,712.21 : x
2. Step 2: Convert to fraction form
   30,859.37/42,585.83 = 16,712.21/x
3. Step 3: Cross multiply
   30,859.37x = 42,585.83 × 16,712.21
4. Step 4: Simplify right side
   30,859.37x = 711,703,162.84
5. Step 5: Solve for x
   x = 711,703,162.84/30,859.37
6. Step 6: Final answer
   x = 23,062.79