Finding the Fourth Proportional to 2,112.24, 3,167.48 and 813.52

Step by Step Solution

1. Step 1: Write the proportion equation
   2,112.24 : 3,167.48 = 813.52 : x
2. Step 2: Convert to fraction form
   2,112.24/3,167.48 = 813.52/x
3. Step 3: Cross multiply
   2,112.24x = 3,167.48 × 813.52
4. Step 4: Simplify right side
   2,112.24x = 2,576,808.33
5. Step 5: Solve for x
   x = 2,576,808.33/2,112.24
6. Step 6: Final answer
   x = 1,219.94