Finding the Fourth Proportional to 30,957.34, 42,721.29 and 16,810.18

Step by Step Solution

1. Step 1: Write the proportion equation
   30,957.34 : 42,721.29 = 16,810.18 : x
2. Step 2: Convert to fraction form
   30,957.34/42,721.29 = 16,810.18/x
3. Step 3: Cross multiply
   30,957.34x = 42,721.29 × 16,810.18
4. Step 4: Simplify right side
   30,957.34x = 718,152,574.73
5. Step 5: Solve for x
   x = 718,152,574.73/30,957.34
6. Step 6: Final answer
   x = 23,198.14