Finding the Fourth Proportional to 2,567.67, 3,851.98 and 813.11

Step by Step Solution

1. Step 1: Write the proportion equation
   2,567.67 : 3,851.98 = 813.11 : x
2. Step 2: Convert to fraction form
   2,567.67/3,851.98 = 813.11/x
3. Step 3: Cross multiply
   2,567.67x = 3,851.98 × 813.11
4. Step 4: Simplify right side
   2,567.67x = 3,132,083.46
5. Step 5: Solve for x
   x = 3,132,083.46/2,567.67
6. Step 6: Final answer
   x = 1,219.82