Finding the Fourth Proportional to 145,123, 200,265.98 and 80,590.60

Step by Step Solution

1. Step 1: Write the proportion equation
   145,123 : 200,265.98 = 80,590.60 : x
2. Step 2: Convert to fraction form
   145,123/200,265.98 = 80,590.60/x
3. Step 3: Cross multiply
   145,123x = 200,265.98 × 80,590.60
4. Step 4: Simplify right side
   145,123x = 16,139,555,487.79
5. Step 5: Solve for x
   x = 16,139,555,487.79/145,123
6. Step 6: Final answer
   x = 111,212.94