Finding the Fourth Proportional to 1,431.27, 1,975.05 and 841.74

Step by Step Solution

1. Step 1: Write the proportion equation
   1,431.27 : 1,975.05 = 841.74 : x
2. Step 2: Convert to fraction form
   1,431.27/1,975.05 = 841.74/x
3. Step 3: Cross multiply
   1,431.27x = 1,975.05 × 841.74
4. Step 4: Simplify right side
   1,431.27x = 1,662,478.59
5. Step 5: Solve for x
   x = 1,662,478.59/1,431.27
6. Step 6: Final answer
   x = 1,161.54