Finding the Fourth Proportional to 1,436.68, 1,982.10 and 815.32

Step by Step Solution

1. Step 1: Write the proportion equation
   1,436.68 : 1,982.10 = 815.32 : x
2. Step 2: Convert to fraction form
   1,436.68/1,982.10 = 815.32/x
3. Step 3: Cross multiply
   1,436.68x = 1,982.10 × 815.32
4. Step 4: Simplify right side
   1,436.68x = 1,616,045.77
5. Step 5: Solve for x
   x = 1,616,045.77/1,436.68
6. Step 6: Final answer
   x = 1,124.85