Finding the Fourth Proportional to 2,236.83, 3,354.60 and 1,139.69

Step by Step Solution

1. Step 1: Write the proportion equation
   2,236.83 : 3,354.60 = 1,139.69 : x
2. Step 2: Convert to fraction form
   2,236.83/3,354.60 = 1,139.69/x
3. Step 3: Cross multiply
   2,236.83x = 3,354.60 × 1,139.69
4. Step 4: Simplify right side
   2,236.83x = 3,823,187.30
5. Step 5: Solve for x
   x = 3,823,187.30/2,236.83
6. Step 6: Final answer
   x = 1,709.20