Finding the Fourth Proportional to 2,557.79, 3,834.62 and 801.89

Step by Step Solution

1. Step 1: Write the proportion equation
   2,557.79 : 3,834.62 = 801.89 : x
2. Step 2: Convert to fraction form
   2,557.79/3,834.62 = 801.89/x
3. Step 3: Cross multiply
   2,557.79x = 3,834.62 × 801.89
4. Step 4: Simplify right side
   2,557.79x = 3,074,939.42
5. Step 5: Solve for x
   x = 3,074,939.42/2,557.79
6. Step 6: Final answer
   x = 1,202.19