Finding the Fourth Proportional to 52,538.80, 72,500.88 and 28,665.28

Step by Step Solution

1. Step 1: Write the proportion equation
   52,538.80 : 72,500.88 = 28,665.28 : x
2. Step 2: Convert to fraction form
   52,538.80/72,500.88 = 28,665.28/x
3. Step 3: Cross multiply
   52,538.80x = 72,500.88 × 28,665.28
4. Step 4: Simplify right side
   52,538.80x = 2,078,258,025.45
5. Step 5: Solve for x
   x = 2,078,258,025.45/52,538.80
6. Step 6: Final answer
   x = 39,556.63