Finding the Fourth Proportional to 1,443.29, 1,991.61 and 845.69

Step by Step Solution

1. Step 1: Write the proportion equation
   1,443.29 : 1,991.61 = 845.69 : x
2. Step 2: Convert to fraction form
   1,443.29/1,991.61 = 845.69/x
3. Step 3: Cross multiply
   1,443.29x = 1,991.61 × 845.69
4. Step 4: Simplify right side
   1,443.29x = 1,684,274.70
5. Step 5: Solve for x
   x = 1,684,274.70/1,443.29
6. Step 6: Final answer
   x = 1,166.97