Finding the Fourth Proportional to 30,786.79, 42,486.15 and 17,355.37

Step by Step Solution

1. Step 1: Write the proportion equation
   30,786.79 : 42,486.15 = 17,355.37 : x
2. Step 2: Convert to fraction form
   30,786.79/42,486.15 = 17,355.37/x
3. Step 3: Cross multiply
   30,786.79x = 42,486.15 × 17,355.37
4. Step 4: Simplify right side
   30,786.79x = 737,362,853.13
5. Step 5: Solve for x
   x = 737,362,853.13/30,786.79
6. Step 6: Final answer
   x = 23,950.62