Finding the Fourth Proportional to 2,574.02, 3,859.88 and 818.69

Step by Step Solution

1. Step 1: Write the proportion equation
   2,574.02 : 3,859.88 = 818.69 : x
2. Step 2: Convert to fraction form
   2,574.02/3,859.88 = 818.69/x
3. Step 3: Cross multiply
   2,574.02x = 3,859.88 × 818.69
4. Step 4: Simplify right side
   2,574.02x = 3,160,036.24
5. Step 5: Solve for x
   x = 3,160,036.24/2,574.02
6. Step 6: Final answer
   x = 1,227.67