Finding the Fourth Proportional to 1,436.30, 2,154.42 and 818.69

Step by Step Solution

1. Step 1: Write the proportion equation
   1,436.30 : 2,154.42 = 818.69 : x
2. Step 2: Convert to fraction form
   1,436.30/2,154.42 = 818.69/x
3. Step 3: Cross multiply
   1,436.30x = 2,154.42 × 818.69
4. Step 4: Simplify right side
   1,436.30x = 1,763,802.11
5. Step 5: Solve for x
   x = 1,763,802.11/1,436.30
6. Step 6: Final answer
   x = 1,228.02