Finding the Fourth Proportional to 1,919.28, 2,648.62 and 1,133.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,919.28 : 2,648.62 = 1,133.72 : x
2. Step 2: Convert to fraction form
   1,919.28/2,648.62 = 1,133.72/x
3. Step 3: Cross multiply
   1,919.28x = 2,648.62 × 1,133.72
4. Step 4: Simplify right side
   1,919.28x = 3,002,774.55
5. Step 5: Solve for x
   x = 3,002,774.55/1,919.28
6. Step 6: Final answer
   x = 1,564.53