Finding the Fourth Proportional to 51,978.99, 71,730.95 and 28,105.62

Step by Step Solution

1. Step 1: Write the proportion equation
   51,978.99 : 71,730.95 = 28,105.62 : x
2. Step 2: Convert to fraction form
   51,978.99/71,730.95 = 28,105.62/x
3. Step 3: Cross multiply
   51,978.99x = 71,730.95 × 28,105.62
4. Step 4: Simplify right side
   51,978.99x = 2,016,042,822.94
5. Step 5: Solve for x
   x = 2,016,042,822.94/51,978.99
6. Step 6: Final answer
   x = 38,785.73