Finding the Fourth Proportional to 42,021.48, 57,989.64 and 23,158.62

Step by Step Solution

1. Step 1: Write the proportion equation
   42,021.48 : 57,989.64 = 23,158.62 : x
2. Step 2: Convert to fraction form
   42,021.48/57,989.64 = 23,158.62/x
3. Step 3: Cross multiply
   42,021.48x = 57,989.64 × 23,158.62
4. Step 4: Simplify right side
   42,021.48x = 1,342,960,036.70
5. Step 5: Solve for x
   x = 1,342,960,036.70/42,021.48
6. Step 6: Final answer
   x = 31,958.89