Finding the Fourth Proportional to 80,597.98, 111,279.45 and 72,073.54

Step by Step Solution

1. Step 1: Write the proportion equation
   80,597.98 : 111,279.45 = 72,073.54 : x
2. Step 2: Convert to fraction form
   80,597.98/111,279.45 = 72,073.54/x
3. Step 3: Cross multiply
   80,597.98x = 111,279.45 × 72,073.54
4. Step 4: Simplify right side
   80,597.98x = 8,020,303,890.75
5. Step 5: Solve for x
   x = 8,020,303,890.75/80,597.98
6. Step 6: Final answer
   x = 99,509.99