Finding the Fourth Proportional to 51,978.62, 71,730.48 and 28,105.30

Step by Step Solution

1. Step 1: Write the proportion equation
   51,978.62 : 71,730.48 = 28,105.30 : x
2. Step 2: Convert to fraction form
   51,978.62/71,730.48 = 28,105.30/x
3. Step 3: Cross multiply
   51,978.62x = 71,730.48 × 28,105.30
4. Step 4: Simplify right side
   51,978.62x = 2,016,006,659.54
5. Step 5: Solve for x
   x = 2,016,006,659.54/51,978.62
6. Step 6: Final answer
   x = 38,785.31