Finding the Fourth Proportional to 28,826.38, 39,781 and 16,251.12

Step by Step Solution

1. Step 1: Write the proportion equation
   28,826.38 : 39,781 = 16,251.12 : x
2. Step 2: Convert to fraction form
   28,826.38/39,781 = 16,251.12/x
3. Step 3: Cross multiply
   28,826.38x = 39,781 × 16,251.12
4. Step 4: Simplify right side
   28,826.38x = 646,485,804.72
5. Step 5: Solve for x
   x = 646,485,804.72/28,826.38
6. Step 6: Final answer
   x = 22,426.88