Finding the Fourth Proportional to 1,443.71, 1,991.79 and 946.63

Step by Step Solution

1. Step 1: Write the proportion equation
   1,443.71 : 1,991.79 = 946.63 : x
2. Step 2: Convert to fraction form
   1,443.71/1,991.79 = 946.63/x
3. Step 3: Cross multiply
   1,443.71x = 1,991.79 × 946.63
4. Step 4: Simplify right side
   1,443.71x = 1,885,479.45
5. Step 5: Solve for x
   x = 1,885,479.45/1,443.71
6. Step 6: Final answer
   x = 1,305.99