Finding the Fourth Proportional to 30,715.49, 42,389.52 and 17,288.03

Step by Step Solution

1. Step 1: Write the proportion equation
   30,715.49 : 42,389.52 = 17,288.03 : x
2. Step 2: Convert to fraction form
   30,715.49/42,389.52 = 17,288.03/x
3. Step 3: Cross multiply
   30,715.49x = 42,389.52 × 17,288.03
4. Step 4: Simplify right side
   30,715.49x = 732,831,293.45
5. Step 5: Solve for x
   x = 732,831,293.45/30,715.49
6. Step 6: Final answer
   x = 23,858.69