Finding the Fourth Proportional to 1,436.87, 1,982.81 and 847.40

Step by Step Solution

1. Step 1: Write the proportion equation
   1,436.87 : 1,982.81 = 847.40 : x
2. Step 2: Convert to fraction form
   1,436.87/1,982.81 = 847.40/x
3. Step 3: Cross multiply
   1,436.87x = 1,982.81 × 847.40
4. Step 4: Simplify right side
   1,436.87x = 1,680,225.40
5. Step 5: Solve for x
   x = 1,680,225.40/1,436.87
6. Step 6: Final answer
   x = 1,169.36