Finding the Fourth Proportional to 2,236.68, 3,086.61 and 1,242.10

Step by Step Solution

1. Step 1: Write the proportion equation
   2,236.68 : 3,086.61 = 1,242.10 : x
2. Step 2: Convert to fraction form
   2,236.68/3,086.61 = 1,242.10/x
3. Step 3: Cross multiply
   2,236.68x = 3,086.61 × 1,242.10
4. Step 4: Simplify right side
   2,236.68x = 3,833,878.28
5. Step 5: Solve for x
   x = 3,833,878.28/2,236.68
6. Step 6: Final answer
   x = 1,714.09