Finding the Fourth Proportional to 42,021.60, 57,989.46 and 23,158.74

Step by Step Solution

1. Step 1: Write the proportion equation
   42,021.60 : 57,989.46 = 23,158.74 : x
2. Step 2: Convert to fraction form
   42,021.60/57,989.46 = 23,158.74/x
3. Step 3: Cross multiply
   42,021.60x = 57,989.46 × 23,158.74
4. Step 4: Simplify right side
   42,021.60x = 1,342,962,826.88
5. Step 5: Solve for x
   x = 1,342,962,826.88/42,021.60
6. Step 6: Final answer
   x = 31,958.87