Finding the Fourth Proportional to 2,056.56, 3,086.04 and 1,236.40

Step by Step Solution

1. Step 1: Write the proportion equation
   2,056.56 : 3,086.04 = 1,236.40 : x
2. Step 2: Convert to fraction form
   2,056.56/3,086.04 = 1,236.40/x
3. Step 3: Cross multiply
   2,056.56x = 3,086.04 × 1,236.40
4. Step 4: Simplify right side
   2,056.56x = 3,815,579.86
5. Step 5: Solve for x
   x = 3,815,579.86/2,056.56
6. Step 6: Final answer
   x = 1,855.32