Finding the Fourth Proportional to 30,660.30, 42,310.71 and 17,047.80

Step by Step Solution

1. Step 1: Write the proportion equation
   30,660.30 : 42,310.71 = 17,047.80 : x
2. Step 2: Convert to fraction form
   30,660.30/42,310.71 = 17,047.80/x
3. Step 3: Cross multiply
   30,660.30x = 42,310.71 × 17,047.80
4. Step 4: Simplify right side
   30,660.30x = 721,304,521.94
5. Step 5: Solve for x
   x = 721,304,521.94/30,660.30
6. Step 6: Final answer
   x = 23,525.68