Finding the Fourth Proportional to 51,978.66, 71,730.51 and 28,105.32

Step by Step Solution

1. Step 1: Write the proportion equation
   51,978.66 : 71,730.51 = 28,105.32 : x
2. Step 2: Convert to fraction form
   51,978.66/71,730.51 = 28,105.32/x
3. Step 3: Cross multiply
   51,978.66x = 71,730.51 × 28,105.32
4. Step 4: Simplify right side
   51,978.66x = 2,016,008,937.31
5. Step 5: Solve for x
   x = 2,016,008,937.31/51,978.66
6. Step 6: Final answer
   x = 38,785.32