Finding the Fourth Proportional to 52,601.78, 72,591.72 and 28,728.25

Step by Step Solution

1. Step 1: Write the proportion equation
   52,601.78 : 72,591.72 = 28,728.25 : x
2. Step 2: Convert to fraction form
   52,601.78/72,591.72 = 28,728.25/x
3. Step 3: Cross multiply
   52,601.78x = 72,591.72 × 28,728.25
4. Step 4: Simplify right side
   52,601.78x = 2,085,433,080.09
5. Step 5: Solve for x
   x = 2,085,433,080.09/52,601.78
6. Step 6: Final answer
   x = 39,645.68