Finding the Fourth Proportional to 30,449.52, 42,020.15 and 17,020.71

Step by Step Solution

1. Step 1: Write the proportion equation
   30,449.52 : 42,020.15 = 17,020.71 : x
2. Step 2: Convert to fraction form
   30,449.52/42,020.15 = 17,020.71/x
3. Step 3: Cross multiply
   30,449.52x = 42,020.15 × 17,020.71
4. Step 4: Simplify right side
   30,449.52x = 715,212,702.20
5. Step 5: Solve for x
   x = 715,212,702.20/30,449.52
6. Step 6: Final answer
   x = 23,488.47