Finding the Fourth Proportional to 80,499.16, 111,020.62 and 51,823.80

Step by Step Solution

1. Step 1: Write the proportion equation
   80,499.16 : 111,020.62 = 51,823.80 : x
2. Step 2: Convert to fraction form
   80,499.16/111,020.62 = 51,823.80/x
3. Step 3: Cross multiply
   80,499.16x = 111,020.62 × 51,823.80
4. Step 4: Simplify right side
   80,499.16x = 5,753,510,406.76
5. Step 5: Solve for x
   x = 5,753,510,406.76/80,499.16
6. Step 6: Final answer
   x = 71,472.92