Finding the Fourth Proportional to 1,431.26, 1,974.83 and 841.58

Step by Step Solution

1. Step 1: Write the proportion equation
   1,431.26 : 1,974.83 = 841.58 : x
2. Step 2: Convert to fraction form
   1,431.26/1,974.83 = 841.58/x
3. Step 3: Cross multiply
   1,431.26x = 1,974.83 × 841.58
4. Step 4: Simplify right side
   1,431.26x = 1,661,963.35
5. Step 5: Solve for x
   x = 1,661,963.35/1,431.26
6. Step 6: Final answer
   x = 1,161.19