Finding the Fourth Proportional to 42,760.83, 59,013.53 and 28,395.28

Step by Step Solution

1. Step 1: Write the proportion equation
   42,760.83 : 59,013.53 = 28,395.28 : x
2. Step 2: Convert to fraction form
   42,760.83/59,013.53 = 28,395.28/x
3. Step 3: Cross multiply
   42,760.83x = 59,013.53 × 28,395.28
4. Step 4: Simplify right side
   42,760.83x = 1,675,705,708.14
5. Step 5: Solve for x
   x = 1,675,705,708.14/42,760.83
6. Step 6: Final answer
   x = 39,187.87