Finding the Fourth Proportional to 73,678.78, 101,676.72 and 40,144.78

Step by Step Solution

1. Step 1: Write the proportion equation
   73,678.78 : 101,676.72 = 40,144.78 : x
2. Step 2: Convert to fraction form
   73,678.78/101,676.72 = 40,144.78/x
3. Step 3: Cross multiply
   73,678.78x = 101,676.72 × 40,144.78
4. Step 4: Simplify right side
   73,678.78x = 4,081,789,555.52
5. Step 5: Solve for x
   x = 4,081,789,555.52/73,678.78
6. Step 6: Final answer
   x = 55,399.80