Finding the Fourth Proportional to 52,661.78, 72,673.28 and 28,788.45

Step by Step Solution

1. Step 1: Write the proportion equation
   52,661.78 : 72,673.28 = 28,788.45 : x
2. Step 2: Convert to fraction form
   52,661.78/72,673.28 = 28,788.45/x
3. Step 3: Cross multiply
   52,661.78x = 72,673.28 × 28,788.45
4. Step 4: Simplify right side
   52,661.78x = 2,092,150,943.67
5. Step 5: Solve for x
   x = 2,092,150,943.67/52,661.78
6. Step 6: Final answer
   x = 39,728.07