Finding the Fourth Proportional to 80,379.50, 111,012.62 and 62,447.31

Step by Step Solution

1. Step 1: Write the proportion equation
   80,379.50 : 111,012.62 = 62,447.31 : x
2. Step 2: Convert to fraction form
   80,379.50/111,012.62 = 62,447.31/x
3. Step 3: Cross multiply
   80,379.50x = 111,012.62 × 62,447.31
4. Step 4: Simplify right side
   80,379.50x = 6,932,439,182.82
5. Step 5: Solve for x
   x = 6,932,439,182.82/80,379.50
6. Step 6: Final answer
   x = 86,246.36