Finding the Fourth Proportional to 1,396.65, 2,091.69 and 1,103.43

Step by Step Solution

1. Step 1: Write the proportion equation
   1,396.65 : 2,091.69 = 1,103.43 : x
2. Step 2: Convert to fraction form
   1,396.65/2,091.69 = 1,103.43/x
3. Step 3: Cross multiply
   1,396.65x = 2,091.69 × 1,103.43
4. Step 4: Simplify right side
   1,396.65x = 2,308,033.50
5. Step 5: Solve for x
   x = 2,308,033.50/1,396.65
6. Step 6: Final answer
   x = 1,652.55