Finding the Fourth Proportional to 30,624.54, 42,231.15 and 28,959.18

Step by Step Solution

1. Step 1: Write the proportion equation
   30,624.54 : 42,231.15 = 28,959.18 : x
2. Step 2: Convert to fraction form
   30,624.54/42,231.15 = 28,959.18/x
3. Step 3: Cross multiply
   30,624.54x = 42,231.15 × 28,959.18
4. Step 4: Simplify right side
   30,624.54x = 1,222,979,474.46
5. Step 5: Solve for x
   x = 1,222,979,474.46/30,624.54
6. Step 6: Final answer
   x = 39,934.62