Finding the Fourth Proportional to 2,236.82, 3,086.86 and 1,242.20

Step by Step Solution

1. Step 1: Write the proportion equation
   2,236.82 : 3,086.86 = 1,242.20 : x
2. Step 2: Convert to fraction form
   2,236.82/3,086.86 = 1,242.20/x
3. Step 3: Cross multiply
   2,236.82x = 3,086.86 × 1,242.20
4. Step 4: Simplify right side
   2,236.82x = 3,834,497.49
5. Step 5: Solve for x
   x = 3,834,497.49/2,236.82
6. Step 6: Final answer
   x = 1,714.26