Finding the Fourth Proportional to 2,091.44, 3,132.84 and 1,628.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,091.44 : 3,132.84 = 1,628.72 : x
2. Step 2: Convert to fraction form
   2,091.44/3,132.84 = 1,628.72/x
3. Step 3: Cross multiply
   2,091.44x = 3,132.84 × 1,628.72
4. Step 4: Simplify right side
   2,091.44x = 5,102,519.16
5. Step 5: Solve for x
   x = 5,102,519.16/2,091.44
6. Step 6: Final answer
   x = 2,439.72