Finding the Fourth Proportional to 2,236.86, 3,086.54 and 1,242.15

Step by Step Solution

1. Step 1: Write the proportion equation
   2,236.86 : 3,086.54 = 1,242.15 : x
2. Step 2: Convert to fraction form
   2,236.86/3,086.54 = 1,242.15/x
3. Step 3: Cross multiply
   2,236.86x = 3,086.54 × 1,242.15
4. Step 4: Simplify right side
   2,236.86x = 3,833,932.53
5. Step 5: Solve for x
   x = 3,833,932.53/2,236.86
6. Step 6: Final answer
   x = 1,713.98