Finding the Fourth Proportional to 2,071.36, 3,106.56 and 1,328.73

Step by Step Solution

1. Step 1: Write the proportion equation
   2,071.36 : 3,106.56 = 1,328.73 : x
2. Step 2: Convert to fraction form
   2,071.36/3,106.56 = 1,328.73/x
3. Step 3: Cross multiply
   2,071.36x = 3,106.56 × 1,328.73
4. Step 4: Simplify right side
   2,071.36x = 4,127,765.33
5. Step 5: Solve for x
   x = 4,127,765.33/2,071.36
6. Step 6: Final answer
   x = 1,992.78