Finding the Fourth Proportional to 1,891.20, 2,834.42 and 850.10

Step by Step Solution

1. Step 1: Write the proportion equation
   1,891.20 : 2,834.42 = 850.10 : x
2. Step 2: Convert to fraction form
   1,891.20/2,834.42 = 850.10/x
3. Step 3: Cross multiply
   1,891.20x = 2,834.42 × 850.10
4. Step 4: Simplify right side
   1,891.20x = 2,409,522.02
5. Step 5: Solve for x
   x = 2,409,522.02/1,891.20
6. Step 6: Final answer
   x = 1,274.07