Finding the Fourth Proportional to 2,236.80, 3,086.72 and 1,408

Step by Step Solution

1. Step 1: Write the proportion equation
   2,236.80 : 3,086.72 = 1,408 : x
2. Step 2: Convert to fraction form
   2,236.80/3,086.72 = 1,408/x
3. Step 3: Cross multiply
   2,236.80x = 3,086.72 × 1,408
4. Step 4: Simplify right side
   2,236.80x = 4,346,101.76
5. Step 5: Solve for x
   x = 4,346,101.76/2,236.80
6. Step 6: Final answer
   x = 1,943.00