Finding the Fourth Proportional to 2,334.78, 3,221.94 and 1,286.82

Step by Step Solution

1. Step 1: Write the proportion equation
   2,334.78 : 3,221.94 = 1,286.82 : x
2. Step 2: Convert to fraction form
   2,334.78/3,221.94 = 1,286.82/x
3. Step 3: Cross multiply
   2,334.78x = 3,221.94 × 1,286.82
4. Step 4: Simplify right side
   2,334.78x = 4,146,056.83
5. Step 5: Solve for x
   x = 4,146,056.83/2,334.78
6. Step 6: Final answer
   x = 1,775.78