Finding the Fourth Proportional to 2,570.33, 3,854.34 and 814.83

Step by Step Solution

1. Step 1: Write the proportion equation
   2,570.33 : 3,854.34 = 814.83 : x
2. Step 2: Convert to fraction form
   2,570.33/3,854.34 = 814.83/x
3. Step 3: Cross multiply
   2,570.33x = 3,854.34 × 814.83
4. Step 4: Simplify right side
   2,570.33x = 3,140,631.86
5. Step 5: Solve for x
   x = 3,140,631.86/2,570.33
6. Step 6: Final answer
   x = 1,221.88