Finding the Fourth Proportional to 73,178.69, 100,986.69 and 39,644.69

Step by Step Solution

1. Step 1: Write the proportion equation
   73,178.69 : 100,986.69 = 39,644.69 : x
2. Step 2: Convert to fraction form
   73,178.69/100,986.69 = 39,644.69/x
3. Step 3: Cross multiply
   73,178.69x = 100,986.69 × 39,644.69
4. Step 4: Simplify right side
   73,178.69x = 4,003,585,766.71
5. Step 5: Solve for x
   x = 4,003,585,766.71/73,178.69
6. Step 6: Final answer
   x = 54,709.72