Finding the Fourth Proportional to 1,443.93, 1,992.51 and 945.78

Step by Step Solution

1. Step 1: Write the proportion equation
   1,443.93 : 1,992.51 = 945.78 : x
2. Step 2: Convert to fraction form
   1,443.93/1,992.51 = 945.78/x
3. Step 3: Cross multiply
   1,443.93x = 1,992.51 × 945.78
4. Step 4: Simplify right side
   1,443.93x = 1,884,476.11
5. Step 5: Solve for x
   x = 1,884,476.11/1,443.93
6. Step 6: Final answer
   x = 1,305.10