Finding the Fourth Proportional to 52,640.42, 72,644.73 and 28,768.10

Step by Step Solution

1. Step 1: Write the proportion equation
   52,640.42 : 72,644.73 = 28,768.10 : x
2. Step 2: Convert to fraction form
   52,640.42/72,644.73 = 28,768.10/x
3. Step 3: Cross multiply
   52,640.42x = 72,644.73 × 28,768.10
4. Step 4: Simplify right side
   52,640.42x = 2,089,850,857.11
5. Step 5: Solve for x
   x = 2,089,850,857.11/52,640.42
6. Step 6: Final answer
   x = 39,700.50