Finding the Fourth Proportional to 52,730.91, 72,768.74 and 28,857.78

Step by Step Solution

1. Step 1: Write the proportion equation
   52,730.91 : 72,768.74 = 28,857.78 : x
2. Step 2: Convert to fraction form
   52,730.91/72,768.74 = 28,857.78/x
3. Step 3: Cross multiply
   52,730.91x = 72,768.74 × 28,857.78
4. Step 4: Simplify right side
   52,730.91x = 2,099,944,145.51
5. Step 5: Solve for x
   x = 2,099,944,145.51/52,730.91
6. Step 6: Final answer
   x = 39,823.78