Finding the Fourth Proportional to 30,638.63, 42,282.33 and 17,212.48

Step by Step Solution

1. Step 1: Write the proportion equation
   30,638.63 : 42,282.33 = 17,212.48 : x
2. Step 2: Convert to fraction form
   30,638.63/42,282.33 = 17,212.48/x
3. Step 3: Cross multiply
   30,638.63x = 42,282.33 × 17,212.48
4. Step 4: Simplify right side
   30,638.63x = 727,783,759.48
5. Step 5: Solve for x
   x = 727,783,759.48/30,638.63
6. Step 6: Final answer
   x = 23,753.80