Finding the Fourth Proportional to 1,436.14, 1,981.92 and 911.62

Step by Step Solution

1. Step 1: Write the proportion equation
   1,436.14 : 1,981.92 = 911.62 : x
2. Step 2: Convert to fraction form
   1,436.14/1,981.92 = 911.62/x
3. Step 3: Cross multiply
   1,436.14x = 1,981.92 × 911.62
4. Step 4: Simplify right side
   1,436.14x = 1,806,757.91
5. Step 5: Solve for x
   x = 1,806,757.91/1,436.14
6. Step 6: Final answer
   x = 1,258.07