Finding the Fourth Proportional to 1,919.40, 2,648.40 and 1,133.58

Step by Step Solution

1. Step 1: Write the proportion equation
   1,919.40 : 2,648.40 = 1,133.58 : x
2. Step 2: Convert to fraction form
   1,919.40/2,648.40 = 1,133.58/x
3. Step 3: Cross multiply
   1,919.40x = 2,648.40 × 1,133.58
4. Step 4: Simplify right side
   1,919.40x = 3,002,173.27
5. Step 5: Solve for x
   x = 3,002,173.27/1,919.40
6. Step 6: Final answer
   x = 1,564.12