Finding the Fourth Proportional to 388,647.72, 582,986.94 and 108,189.48

Step by Step Solution

1. Step 1: Write the proportion equation
   388,647.72 : 582,986.94 = 108,189.48 : x
2. Step 2: Convert to fraction form
   388,647.72/582,986.94 = 108,189.48/x
3. Step 3: Cross multiply
   388,647.72x = 582,986.94 × 108,189.48
4. Step 4: Simplify right side
   388,647.72x = 63,073,053,885.39
5. Step 5: Solve for x
   x = 63,073,053,885.39/388,647.72
6. Step 6: Final answer
   x = 162,288.50