Finding the Fourth Proportional to 1,431.27, 1,974.17 and 841.59

Step by Step Solution

1. Step 1: Write the proportion equation
   1,431.27 : 1,974.17 = 841.59 : x
2. Step 2: Convert to fraction form
   1,431.27/1,974.17 = 841.59/x
3. Step 3: Cross multiply
   1,431.27x = 1,974.17 × 841.59
4. Step 4: Simplify right side
   1,431.27x = 1,661,443.83
5. Step 5: Solve for x
   x = 1,661,443.83/1,431.27
6. Step 6: Final answer
   x = 1,160.82