Finding the Fourth Proportional to 1,167.39, 1,610.12 and 813.33

Step by Step Solution

1. Step 1: Write the proportion equation
   1,167.39 : 1,610.12 = 813.33 : x
2. Step 2: Convert to fraction form
   1,167.39/1,610.12 = 813.33/x
3. Step 3: Cross multiply
   1,167.39x = 1,610.12 × 813.33
4. Step 4: Simplify right side
   1,167.39x = 1,309,558.10
5. Step 5: Solve for x
   x = 1,309,558.10/1,167.39
6. Step 6: Final answer
   x = 1,121.79