Finding the Fourth Proportional to 52,601.91, 72,588.74 and 28,728.15

Step by Step Solution

1. Step 1: Write the proportion equation
   52,601.91 : 72,588.74 = 28,728.15 : x
2. Step 2: Convert to fraction form
   52,601.91/72,588.74 = 28,728.15/x
3. Step 3: Cross multiply
   52,601.91x = 72,588.74 × 28,728.15
4. Step 4: Simplify right side
   52,601.91x = 2,085,340,067.39
5. Step 5: Solve for x
   x = 2,085,340,067.39/52,601.91
6. Step 6: Final answer
   x = 39,643.81