Finding the Fourth Proportional to 30,707.91, 42,377.31 and 17,278.38

Step by Step Solution

1. Step 1: Write the proportion equation
   30,707.91 : 42,377.31 = 17,278.38 : x
2. Step 2: Convert to fraction form
   30,707.91/42,377.31 = 17,278.38/x
3. Step 3: Cross multiply
   30,707.91x = 42,377.31 × 17,278.38
4. Step 4: Simplify right side
   30,707.91x = 732,211,265.56
5. Step 5: Solve for x
   x = 732,211,265.56/30,707.91
6. Step 6: Final answer
   x = 23,844.39