Finding the Fourth Proportional to 1,436.59, 1,981.41 and 912.79

Step by Step Solution

1. Step 1: Write the proportion equation
   1,436.59 : 1,981.41 = 912.79 : x
2. Step 2: Convert to fraction form
   1,436.59/1,981.41 = 912.79/x
3. Step 3: Cross multiply
   1,436.59x = 1,981.41 × 912.79
4. Step 4: Simplify right side
   1,436.59x = 1,808,611.23
5. Step 5: Solve for x
   x = 1,808,611.23/1,436.59
6. Step 6: Final answer
   x = 1,258.96