Finding the Fourth Proportional to 1,436.63, 1,982.54 and 815.63

Step by Step Solution

1. Step 1: Write the proportion equation
   1,436.63 : 1,982.54 = 815.63 : x
2. Step 2: Convert to fraction form
   1,436.63/1,982.54 = 815.63/x
3. Step 3: Cross multiply
   1,436.63x = 1,982.54 × 815.63
4. Step 4: Simplify right side
   1,436.63x = 1,617,011.23
5. Step 5: Solve for x
   x = 1,617,011.23/1,436.63
6. Step 6: Final answer
   x = 1,125.56