Finding the Fourth Proportional to 1,381.27, 1,906.49 and 850.29

Step by Step Solution

1. Step 1: Write the proportion equation
   1,381.27 : 1,906.49 = 850.29 : x
2. Step 2: Convert to fraction form
   1,381.27/1,906.49 = 850.29/x
3. Step 3: Cross multiply
   1,381.27x = 1,906.49 × 850.29
4. Step 4: Simplify right side
   1,381.27x = 1,621,069.38
5. Step 5: Solve for x
   x = 1,621,069.38/1,381.27
6. Step 6: Final answer
   x = 1,173.61