Finding the Fourth Proportional to 1,443.75, 1,991.64 and 946.41

Step by Step Solution

1. Step 1: Write the proportion equation
   1,443.75 : 1,991.64 = 946.41 : x
2. Step 2: Convert to fraction form
   1,443.75/1,991.64 = 946.41/x
3. Step 3: Cross multiply
   1,443.75x = 1,991.64 × 946.41
4. Step 4: Simplify right side
   1,443.75x = 1,884,908.01
5. Step 5: Solve for x
   x = 1,884,908.01/1,443.75
6. Step 6: Final answer
   x = 1,305.56