Finding the Fourth Proportional to 1,431.25, 1,974.82 and 841.57

Step by Step Solution

1. Step 1: Write the proportion equation
   1,431.25 : 1,974.82 = 841.57 : x
2. Step 2: Convert to fraction form
   1,431.25/1,974.82 = 841.57/x
3. Step 3: Cross multiply
   1,431.25x = 1,974.82 × 841.57
4. Step 4: Simplify right side
   1,431.25x = 1,661,949.27
5. Step 5: Solve for x
   x = 1,661,949.27/1,431.25
6. Step 6: Final answer
   x = 1,161.19