Finding the Fourth Proportional to 2,562.81, 3,843.27 and 918.96

Step by Step Solution

1. Step 1: Write the proportion equation
   2,562.81 : 3,843.27 = 918.96 : x
2. Step 2: Convert to fraction form
   2,562.81/3,843.27 = 918.96/x
3. Step 3: Cross multiply
   2,562.81x = 3,843.27 × 918.96
4. Step 4: Simplify right side
   2,562.81x = 3,531,811.40
5. Step 5: Solve for x
   x = 3,531,811.40/2,562.81
6. Step 6: Final answer
   x = 1,378.10