Finding the Fourth Proportional to 2,286.84, 3,428.82 and 825.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,286.84 : 3,428.82 = 825.72 : x
2. Step 2: Convert to fraction form
   2,286.84/3,428.82 = 825.72/x
3. Step 3: Cross multiply
   2,286.84x = 3,428.82 × 825.72
4. Step 4: Simplify right side
   2,286.84x = 2,831,245.25
5. Step 5: Solve for x
   x = 2,831,245.25/2,286.84
6. Step 6: Final answer
   x = 1,238.06