Finding the Fourth Proportional to 2,786.38, 4,174.35 and 1,398.09

Step by Step Solution

1. Step 1: Write the proportion equation
   2,786.38 : 4,174.35 = 1,398.09 : x
2. Step 2: Convert to fraction form
   2,786.38/4,174.35 = 1,398.09/x
3. Step 3: Cross multiply
   2,786.38x = 4,174.35 × 1,398.09
4. Step 4: Simplify right side
   2,786.38x = 5,836,116.99
5. Step 5: Solve for x
   x = 5,836,116.99/2,786.38
6. Step 6: Final answer
   x = 2,094.52