Finding the Fourth Proportional to 2,672.19, 4,008.56 and 823.37

Step by Step Solution

1. Step 1: Write the proportion equation
   2,672.19 : 4,008.56 = 823.37 : x
2. Step 2: Convert to fraction form
   2,672.19/4,008.56 = 823.37/x
3. Step 3: Cross multiply
   2,672.19x = 4,008.56 × 823.37
4. Step 4: Simplify right side
   2,672.19x = 3,300,503.89
5. Step 5: Solve for x
   x = 3,300,503.89/2,672.19
6. Step 6: Final answer
   x = 1,235.13