Finding the Fourth Proportional to 1,443.75, 1,992.51 and 919.68

Step by Step Solution

1. Step 1: Write the proportion equation
   1,443.75 : 1,992.51 = 919.68 : x
2. Step 2: Convert to fraction form
   1,443.75/1,992.51 = 919.68/x
3. Step 3: Cross multiply
   1,443.75x = 1,992.51 × 919.68
4. Step 4: Simplify right side
   1,443.75x = 1,832,471.60
5. Step 5: Solve for x
   x = 1,832,471.60/1,443.75
6. Step 6: Final answer
   x = 1,269.24