Finding the Fourth Proportional to 1,478.43, 2,039.52 and 919.53

Step by Step Solution

1. Step 1: Write the proportion equation
   1,478.43 : 2,039.52 = 919.53 : x
2. Step 2: Convert to fraction form
   1,478.43/2,039.52 = 919.53/x
3. Step 3: Cross multiply
   1,478.43x = 2,039.52 × 919.53
4. Step 4: Simplify right side
   1,478.43x = 1,875,399.83
5. Step 5: Solve for x
   x = 1,875,399.83/1,478.43
6. Step 6: Final answer
   x = 1,268.51