Finding the Fourth Proportional to 2,153.49, 3,227.60 and 919.46

Step by Step Solution

1. Step 1: Write the proportion equation
   2,153.49 : 3,227.60 = 919.46 : x
2. Step 2: Convert to fraction form
   2,153.49/3,227.60 = 919.46/x
3. Step 3: Cross multiply
   2,153.49x = 3,227.60 × 919.46
4. Step 4: Simplify right side
   2,153.49x = 2,967,649.10
5. Step 5: Solve for x
   x = 2,967,649.10/2,153.49
6. Step 6: Final answer
   x = 1,378.06