Finding the Fourth Proportional to 30,716.18, 42,389.69 and 17,288.30

Step by Step Solution

1. Step 1: Write the proportion equation
   30,716.18 : 42,389.69 = 17,288.30 : x
2. Step 2: Convert to fraction form
   30,716.18/42,389.69 = 17,288.30/x
3. Step 3: Cross multiply
   30,716.18x = 42,389.69 × 17,288.30
4. Step 4: Simplify right side
   30,716.18x = 732,845,826.82
5. Step 5: Solve for x
   x = 732,845,826.82/30,716.18
6. Step 6: Final answer
   x = 23,858.63