Finding the Fourth Proportional to 42,021.85, 57,990.15 and 23,158.97

Step by Step Solution

1. Step 1: Write the proportion equation
   42,021.85 : 57,990.15 = 23,158.97 : x
2. Step 2: Convert to fraction form
   42,021.85/57,990.15 = 23,158.97/x
3. Step 3: Cross multiply
   42,021.85x = 57,990.15 × 23,158.97
4. Step 4: Simplify right side
   42,021.85x = 1,342,992,144.15
5. Step 5: Solve for x
   x = 1,342,992,144.15/42,021.85
6. Step 6: Final answer
   x = 31,959.38