Finding the Fourth Proportional to 30,962.32, 42,745.71 and 20,382.71

Step by Step Solution

1. Step 1: Write the proportion equation
   30,962.32 : 42,745.71 = 20,382.71 : x
2. Step 2: Convert to fraction form
   30,962.32/42,745.71 = 20,382.71/x
3. Step 3: Cross multiply
   30,962.32x = 42,745.71 × 20,382.71
4. Step 4: Simplify right side
   30,962.32x = 871,273,196.95
5. Step 5: Solve for x
   x = 871,273,196.95/30,962.32
6. Step 6: Final answer
   x = 28,139.79