Finding the Fourth Proportional to 51,978.64, 71,730.20 and 28,105.36

Step by Step Solution

1. Step 1: Write the proportion equation
   51,978.64 : 71,730.20 = 28,105.36 : x
2. Step 2: Convert to fraction form
   51,978.64/71,730.20 = 28,105.36/x
3. Step 3: Cross multiply
   51,978.64x = 71,730.20 × 28,105.36
4. Step 4: Simplify right side
   51,978.64x = 2,016,003,093.87
5. Step 5: Solve for x
   x = 2,016,003,093.87/51,978.64
6. Step 6: Final answer
   x = 38,785.22