Finding the Fourth Proportional to 31,668.50, 43,702.47 and 17,521.31

Step by Step Solution

1. Step 1: Write the proportion equation
   31,668.50 : 43,702.47 = 17,521.31 : x
2. Step 2: Convert to fraction form
   31,668.50/43,702.47 = 17,521.31/x
3. Step 3: Cross multiply
   31,668.50x = 43,702.47 × 17,521.31
4. Step 4: Simplify right side
   31,668.50x = 765,724,633.89
5. Step 5: Solve for x
   x = 765,724,633.89/31,668.50
6. Step 6: Final answer
   x = 24,179.38