Finding the Fourth Proportional to 41,978.28, 57,929.91 and 23,115.42

Step by Step Solution

1. Step 1: Write the proportion equation
   41,978.28 : 57,929.91 = 23,115.42 : x
2. Step 2: Convert to fraction form
   41,978.28/57,929.91 = 23,115.42/x
3. Step 3: Cross multiply
   41,978.28x = 57,929.91 × 23,115.42
4. Step 4: Simplify right side
   41,978.28x = 1,339,074,200.21
5. Step 5: Solve for x
   x = 1,339,074,200.21/41,978.28
6. Step 6: Final answer
   x = 31,899.22