Finding the Fourth Proportional to 2,280.21, 3,419.43 and 892.74

Step by Step Solution

1. Step 1: Write the proportion equation
   2,280.21 : 3,419.43 = 892.74 : x
2. Step 2: Convert to fraction form
   2,280.21/3,419.43 = 892.74/x
3. Step 3: Cross multiply
   2,280.21x = 3,419.43 × 892.74
4. Step 4: Simplify right side
   2,280.21x = 3,052,661.94
5. Step 5: Solve for x
   x = 3,052,661.94/2,280.21
6. Step 6: Final answer
   x = 1,338.76