Finding the Fourth Proportional to 31,578.69, 43,578.60 and 17,431.54

Step by Step Solution

1. Step 1: Write the proportion equation
   31,578.69 : 43,578.60 = 17,431.54 : x
2. Step 2: Convert to fraction form
   31,578.69/43,578.60 = 17,431.54/x
3. Step 3: Cross multiply
   31,578.69x = 43,578.60 × 17,431.54
4. Step 4: Simplify right side
   31,578.69x = 759,642,109.04
5. Step 5: Solve for x
   x = 759,642,109.04/31,578.69
6. Step 6: Final answer
   x = 24,055.53