Finding the Fourth Proportional to 1,381.73, 1,906.81 and 850.41

Step by Step Solution

1. Step 1: Write the proportion equation
   1,381.73 : 1,906.81 = 850.41 : x
2. Step 2: Convert to fraction form
   1,381.73/1,906.81 = 850.41/x
3. Step 3: Cross multiply
   1,381.73x = 1,906.81 × 850.41
4. Step 4: Simplify right side
   1,381.73x = 1,621,570.29
5. Step 5: Solve for x
   x = 1,621,570.29/1,381.73
6. Step 6: Final answer
   x = 1,173.58