Finding the Fourth Proportional to 2,278.33, 3,417.37 and 892.78

Step by Step Solution

1. Step 1: Write the proportion equation
   2,278.33 : 3,417.37 = 892.78 : x
2. Step 2: Convert to fraction form
   2,278.33/3,417.37 = 892.78/x
3. Step 3: Cross multiply
   2,278.33x = 3,417.37 × 892.78
4. Step 4: Simplify right side
   2,278.33x = 3,050,948.81
5. Step 5: Solve for x
   x = 3,050,948.81/2,278.33
6. Step 6: Final answer
   x = 1,339.12