Finding the Fourth Proportional to 80,379.27, 120,544.27 and 55,578.69

Step by Step Solution

1. Step 1: Write the proportion equation
   80,379.27 : 120,544.27 = 55,578.69 : x
2. Step 2: Convert to fraction form
   80,379.27/120,544.27 = 55,578.69/x
3. Step 3: Cross multiply
   80,379.27x = 120,544.27 × 55,578.69
4. Step 4: Simplify right side
   80,379.27x = 6,699,692,613.61
5. Step 5: Solve for x
   x = 6,699,692,613.61/80,379.27
6. Step 6: Final answer
   x = 83,351.00