Finding the Fourth Proportional to 51,116.20, 70,542.42 and 28,456.12

Step by Step Solution

1. Step 1: Write the proportion equation
   51,116.20 : 70,542.42 = 28,456.12 : x
2. Step 2: Convert to fraction form
   51,116.20/70,542.42 = 28,456.12/x
3. Step 3: Cross multiply
   51,116.20x = 70,542.42 × 28,456.12
4. Step 4: Simplify right side
   51,116.20x = 2,007,363,568.61
5. Step 5: Solve for x
   x = 2,007,363,568.61/51,116.20
6. Step 6: Final answer
   x = 39,270.59