Finding the Fourth Proportional to 22,961.43, 31,683 and 13,528.71

Step by Step Solution

1. Step 1: Write the proportion equation
   22,961.43 : 31,683 = 13,528.71 : x
2. Step 2: Convert to fraction form
   22,961.43/31,683 = 13,528.71/x
3. Step 3: Cross multiply
   22,961.43x = 31,683 × 13,528.71
4. Step 4: Simplify right side
   22,961.43x = 428,630,118.93
5. Step 5: Solve for x
   x = 428,630,118.93/22,961.43
6. Step 6: Final answer
   x = 18,667.40