Finding the Fourth Proportional to 73,178, 100,986.72 and 39,644

Step by Step Solution

1. Step 1: Write the proportion equation
   73,178 : 100,986.72 = 39,644 : x
2. Step 2: Convert to fraction form
   73,178/100,986.72 = 39,644/x
3. Step 3: Cross multiply
   73,178x = 100,986.72 × 39,644
4. Step 4: Simplify right side
   73,178x = 4,003,517,527.68
5. Step 5: Solve for x
   x = 4,003,517,527.68/73,178
6. Step 6: Final answer
   x = 54,709.31