Finding the Fourth Proportional to 52,308.50, 72,187.13 and 28,436.78

Step by Step Solution

1. Step 1: Write the proportion equation
   52,308.50 : 72,187.13 = 28,436.78 : x
2. Step 2: Convert to fraction form
   52,308.50/72,187.13 = 28,436.78/x
3. Step 3: Cross multiply
   52,308.50x = 72,187.13 × 28,436.78
4. Step 4: Simplify right side
   52,308.50x = 2,052,769,786.20
5. Step 5: Solve for x
   x = 2,052,769,786.20/52,308.50
6. Step 6: Final answer
   x = 39,243.53