Finding the Fourth Proportional to 31,005.62, 42,786.86 and 17,578.12

Step by Step Solution

1. Step 1: Write the proportion equation
   31,005.62 : 42,786.86 = 17,578.12 : x
2. Step 2: Convert to fraction form
   31,005.62/42,786.86 = 17,578.12/x
3. Step 3: Cross multiply
   31,005.62x = 42,786.86 × 17,578.12
4. Step 4: Simplify right side
   31,005.62x = 752,112,559.50
5. Step 5: Solve for x
   x = 752,112,559.50/31,005.62
6. Step 6: Final answer
   x = 24,257.30