Finding the Fourth Proportional to 1,436.48, 2,153.13 and 818.82

Step by Step Solution

1. Step 1: Write the proportion equation
   1,436.48 : 2,153.13 = 818.82 : x
2. Step 2: Convert to fraction form
   1,436.48/2,153.13 = 818.82/x
3. Step 3: Cross multiply
   1,436.48x = 2,153.13 × 818.82
4. Step 4: Simplify right side
   1,436.48x = 1,763,025.91
5. Step 5: Solve for x
   x = 1,763,025.91/1,436.48
6. Step 6: Final answer
   x = 1,227.32