Finding the Fourth Proportional to 52,745.60, 72,789 and 28,873.79

Step by Step Solution

1. Step 1: Write the proportion equation
   52,745.60 : 72,789 = 28,873.79 : x
2. Step 2: Convert to fraction form
   52,745.60/72,789 = 28,873.79/x
3. Step 3: Cross multiply
   52,745.60x = 72,789 × 28,873.79
4. Step 4: Simplify right side
   52,745.60x = 2,101,693,936.37
5. Step 5: Solve for x
   x = 2,101,693,936.37/52,745.60
6. Step 6: Final answer
   x = 39,845.87