Finding the Fourth Proportional to 52,811.44, 72,879.12 and 28,936.72

Step by Step Solution

1. Step 1: Write the proportion equation
   52,811.44 : 72,879.12 = 28,936.72 : x
2. Step 2: Convert to fraction form
   52,811.44/72,879.12 = 28,936.72/x
3. Step 3: Cross multiply
   52,811.44x = 72,879.12 × 28,936.72
4. Step 4: Simplify right side
   52,811.44x = 2,108,882,689.29
5. Step 5: Solve for x
   x = 2,108,882,689.29/52,811.44
6. Step 6: Final answer
   x = 39,932.31