Finding the Fourth Proportional to 1,431.09, 1,975.05 and 841.82

Step by Step Solution

1. Step 1: Write the proportion equation
   1,431.09 : 1,975.05 = 841.82 : x
2. Step 2: Convert to fraction form
   1,431.09/1,975.05 = 841.82/x
3. Step 3: Cross multiply
   1,431.09x = 1,975.05 × 841.82
4. Step 4: Simplify right side
   1,431.09x = 1,662,626.72
5. Step 5: Solve for x
   x = 1,662,626.72/1,431.09
6. Step 6: Final answer
   x = 1,161.79