Finding the Fourth Proportional to 31,578.35, 43,578.04 and 17,431.10

Step by Step Solution

1. Step 1: Write the proportion equation
   31,578.35 : 43,578.04 = 17,431.10 : x
2. Step 2: Convert to fraction form
   31,578.35/43,578.04 = 17,431.10/x
3. Step 3: Cross multiply
   31,578.35x = 43,578.04 × 17,431.10
4. Step 4: Simplify right side
   31,578.35x = 759,612,868.00
5. Step 5: Solve for x
   x = 759,612,868.00/31,578.35
6. Step 6: Final answer
   x = 24,054.86