Finding the Fourth Proportional to 30,713.72, 42,384.71 and 17,285.09

Step by Step Solution

1. Step 1: Write the proportion equation
   30,713.72 : 42,384.71 = 17,285.09 : x
2. Step 2: Convert to fraction form
   30,713.72/42,384.71 = 17,285.09/x
3. Step 3: Cross multiply
   30,713.72x = 42,384.71 × 17,285.09
4. Step 4: Simplify right side
   30,713.72x = 732,623,228.62
5. Step 5: Solve for x
   x = 732,623,228.62/30,713.72
6. Step 6: Final answer
   x = 23,853.29