Finding the Fourth Proportional to 2,573.31, 3,860.34 and 817.73

Step by Step Solution

1. Step 1: Write the proportion equation
   2,573.31 : 3,860.34 = 817.73 : x
2. Step 2: Convert to fraction form
   2,573.31/3,860.34 = 817.73/x
3. Step 3: Cross multiply
   2,573.31x = 3,860.34 × 817.73
4. Step 4: Simplify right side
   2,573.31x = 3,156,715.83
5. Step 5: Solve for x
   x = 3,156,715.83/2,573.31
6. Step 6: Final answer
   x = 1,226.71