Finding the Fourth Proportional to 31,005.63, 42,786.84 and 17,578.11

Step by Step Solution

1. Step 1: Write the proportion equation
   31,005.63 : 42,786.84 = 17,578.11 : x
2. Step 2: Convert to fraction form
   31,005.63/42,786.84 = 17,578.11/x
3. Step 3: Cross multiply
   31,005.63x = 42,786.84 × 17,578.11
4. Step 4: Simplify right side
   31,005.63x = 752,111,780.07
5. Step 5: Solve for x
   x = 752,111,780.07/31,005.63
6. Step 6: Final answer
   x = 24,257.26