Finding the Fourth Proportional to 2,280.96, 3,420.12 and 892.69

Step by Step Solution

1. Step 1: Write the proportion equation
   2,280.96 : 3,420.12 = 892.69 : x
2. Step 2: Convert to fraction form
   2,280.96/3,420.12 = 892.69/x
3. Step 3: Cross multiply
   2,280.96x = 3,420.12 × 892.69
4. Step 4: Simplify right side
   2,280.96x = 3,053,101.72
5. Step 5: Solve for x
   x = 3,053,101.72/2,280.96
6. Step 6: Final answer
   x = 1,338.52