Finding the Fourth Proportional to 1,431.15, 1,974.99 and 841.69

Step by Step Solution

1. Step 1: Write the proportion equation
   1,431.15 : 1,974.99 = 841.69 : x
2. Step 2: Convert to fraction form
   1,431.15/1,974.99 = 841.69/x
3. Step 3: Cross multiply
   1,431.15x = 1,974.99 × 841.69
4. Step 4: Simplify right side
   1,431.15x = 1,662,315.25
5. Step 5: Solve for x
   x = 1,662,315.25/1,431.15
6. Step 6: Final answer
   x = 1,161.52