Finding the Fourth Proportional to 52,730.49, 72,768.06 and 28,857.15

Step by Step Solution

1. Step 1: Write the proportion equation
   52,730.49 : 72,768.06 = 28,857.15 : x
2. Step 2: Convert to fraction form
   52,730.49/72,768.06 = 28,857.15/x
3. Step 3: Cross multiply
   52,730.49x = 72,768.06 × 28,857.15
4. Step 4: Simplify right side
   52,730.49x = 2,099,878,822.63
5. Step 5: Solve for x
   x = 2,099,878,822.63/52,730.49
6. Step 6: Final answer
   x = 39,822.86