Finding the Fourth Proportional to 39,968.52, 55,158.39 and 22,978.29

Step by Step Solution

1. Step 1: Write the proportion equation
   39,968.52 : 55,158.39 = 22,978.29 : x
2. Step 2: Convert to fraction form
   39,968.52/55,158.39 = 22,978.29/x
3. Step 3: Cross multiply
   39,968.52x = 55,158.39 × 22,978.29
4. Step 4: Simplify right side
   39,968.52x = 1,267,445,481.35
5. Step 5: Solve for x
   x = 1,267,445,481.35/39,968.52
6. Step 6: Final answer
   x = 31,711.09