Finding the Fourth Proportional to 42,012.68, 57,974.64 and 23,149.76

Step by Step Solution

1. Step 1: Write the proportion equation
   42,012.68 : 57,974.64 = 23,149.76 : x
2. Step 2: Convert to fraction form
   42,012.68/57,974.64 = 23,149.76/x
3. Step 3: Cross multiply
   42,012.68x = 57,974.64 × 23,149.76
4. Step 4: Simplify right side
   42,012.68x = 1,342,099,002.09
5. Step 5: Solve for x
   x = 1,342,099,002.09/42,012.68
6. Step 6: Final answer
   x = 31,945.09