Finding the Fourth Proportional to 42,249.18, 58,351.72 and 28,797.30

Step by Step Solution

1. Step 1: Write the proportion equation
   42,249.18 : 58,351.72 = 28,797.30 : x
2. Step 2: Convert to fraction form
   42,249.18/58,351.72 = 28,797.30/x
3. Step 3: Cross multiply
   42,249.18x = 58,351.72 × 28,797.30
4. Step 4: Simplify right side
   42,249.18x = 1,680,371,986.36
5. Step 5: Solve for x
   x = 1,680,371,986.36/42,249.18
6. Step 6: Final answer
   x = 39,772.89