Finding the Fourth Proportional to 2,133.01, 3,197 and 815.89

Step by Step Solution

1. Step 1: Write the proportion equation
   2,133.01 : 3,197 = 815.89 : x
2. Step 2: Convert to fraction form
   2,133.01/3,197 = 815.89/x
3. Step 3: Cross multiply
   2,133.01x = 3,197 × 815.89
4. Step 4: Simplify right side
   2,133.01x = 2,608,400.33
5. Step 5: Solve for x
   x = 2,608,400.33/2,133.01
6. Step 6: Final answer
   x = 1,222.88