Finding the Fourth Proportional to 30,713.16, 42,387.60 and 17,287.68

Step by Step Solution

1. Step 1: Write the proportion equation
   30,713.16 : 42,387.60 = 17,287.68 : x
2. Step 2: Convert to fraction form
   30,713.16/42,387.60 = 17,287.68/x
3. Step 3: Cross multiply
   30,713.16x = 42,387.60 × 17,287.68
4. Step 4: Simplify right side
   30,713.16x = 732,783,264.77
5. Step 5: Solve for x
   x = 732,783,264.77/30,713.16
6. Step 6: Final answer
   x = 23,858.93