Finding the Fourth Proportional to 30,906.86, 42,653.82 and 17,478.38

Step by Step Solution

1. Step 1: Write the proportion equation
   30,906.86 : 42,653.82 = 17,478.38 : x
2. Step 2: Convert to fraction form
   30,906.86/42,653.82 = 17,478.38/x
3. Step 3: Cross multiply
   30,906.86x = 42,653.82 × 17,478.38
4. Step 4: Simplify right side
   30,906.86x = 745,519,674.41
5. Step 5: Solve for x
   x = 745,519,674.41/30,906.86
6. Step 6: Final answer
   x = 24,121.50