Finding the Fourth Proportional to 31,659.75, 43,690.50 and 17,513.55

Step by Step Solution

1. Step 1: Write the proportion equation
   31,659.75 : 43,690.50 = 17,513.55 : x
2. Step 2: Convert to fraction form
   31,659.75/43,690.50 = 17,513.55/x
3. Step 3: Cross multiply
   31,659.75x = 43,690.50 × 17,513.55
4. Step 4: Simplify right side
   31,659.75x = 765,175,756.28
5. Step 5: Solve for x
   x = 765,175,756.28/31,659.75
6. Step 6: Final answer
   x = 24,168.72