Finding the Fourth Proportional to 1,436.56, 2,153.57 and 850.12

Step by Step Solution

1. Step 1: Write the proportion equation
   1,436.56 : 2,153.57 = 850.12 : x
2. Step 2: Convert to fraction form
   1,436.56/2,153.57 = 850.12/x
3. Step 3: Cross multiply
   1,436.56x = 2,153.57 × 850.12
4. Step 4: Simplify right side
   1,436.56x = 1,830,792.93
5. Step 5: Solve for x
   x = 1,830,792.93/1,436.56
6. Step 6: Final answer
   x = 1,274.43