Finding the Fourth Proportional to 1,704.79, 2,555.56 and 1,086.76

Step by Step Solution

1. Step 1: Write the proportion equation
   1,704.79 : 2,555.56 = 1,086.76 : x
2. Step 2: Convert to fraction form
   1,704.79/2,555.56 = 1,086.76/x
3. Step 3: Cross multiply
   1,704.79x = 2,555.56 × 1,086.76
4. Step 4: Simplify right side
   1,704.79x = 2,777,280.39
5. Step 5: Solve for x
   x = 2,777,280.39/1,704.79
6. Step 6: Final answer
   x = 1,629.10