Finding the Fourth Proportional to 30,639.61, 42,282.83 and 17,211.43

Step by Step Solution

1. Step 1: Write the proportion equation
   30,639.61 : 42,282.83 = 17,211.43 : x
2. Step 2: Convert to fraction form
   30,639.61/42,282.83 = 17,211.43/x
3. Step 3: Cross multiply
   30,639.61x = 42,282.83 × 17,211.43
4. Step 4: Simplify right side
   30,639.61x = 727,747,671.28
5. Step 5: Solve for x
   x = 727,747,671.28/30,639.61
6. Step 6: Final answer
   x = 23,751.86