Finding the Fourth Proportional to 30,715.16, 42,388.29 and 17,287.29

Step by Step Solution

1. Step 1: Write the proportion equation
   30,715.16 : 42,388.29 = 17,287.29 : x
2. Step 2: Convert to fraction form
   30,715.16/42,388.29 = 17,287.29/x
3. Step 3: Cross multiply
   30,715.16x = 42,388.29 × 17,287.29
4. Step 4: Simplify right side
   30,715.16x = 732,778,496.96
5. Step 5: Solve for x
   x = 732,778,496.96/30,715.16
6. Step 6: Final answer
   x = 23,857.22