Finding the Fourth Proportional to 2,562.86, 3,843.27 and 918.90

Step by Step Solution

1. Step 1: Write the proportion equation
   2,562.86 : 3,843.27 = 918.90 : x
2. Step 2: Convert to fraction form
   2,562.86/3,843.27 = 918.90/x
3. Step 3: Cross multiply
   2,562.86x = 3,843.27 × 918.90
4. Step 4: Simplify right side
   2,562.86x = 3,531,580.80
5. Step 5: Solve for x
   x = 3,531,580.80/2,562.86
6. Step 6: Final answer
   x = 1,377.98