Finding the Fourth Proportional to 2,672.42, 4,007.15 and 823.01

Step by Step Solution

1. Step 1: Write the proportion equation
   2,672.42 : 4,007.15 = 823.01 : x
2. Step 2: Convert to fraction form
   2,672.42/4,007.15 = 823.01/x
3. Step 3: Cross multiply
   2,672.42x = 4,007.15 × 823.01
4. Step 4: Simplify right side
   2,672.42x = 3,297,930.42
5. Step 5: Solve for x
   x = 3,297,930.42/2,672.42
6. Step 6: Final answer
   x = 1,234.06