Finding the Fourth Proportional to 73,158.78, 109,738.56 and 20,568.72

Step by Step Solution

1. Step 1: Write the proportion equation
   73,158.78 : 109,738.56 = 20,568.72 : x
2. Step 2: Convert to fraction form
   73,158.78/109,738.56 = 20,568.72/x
3. Step 3: Cross multiply
   73,158.78x = 109,738.56 × 20,568.72
4. Step 4: Simplify right side
   73,158.78x = 2,257,181,713.84
5. Step 5: Solve for x
   x = 2,257,181,713.84/73,158.78
6. Step 6: Final answer
   x = 30,853.19