Finding the Fourth Proportional to 1,436.22, 1,982.02 and 815.22

Step by Step Solution

1. Step 1: Write the proportion equation
   1,436.22 : 1,982.02 = 815.22 : x
2. Step 2: Convert to fraction form
   1,436.22/1,982.02 = 815.22/x
3. Step 3: Cross multiply
   1,436.22x = 1,982.02 × 815.22
4. Step 4: Simplify right side
   1,436.22x = 1,615,782.34
5. Step 5: Solve for x
   x = 1,615,782.34/1,436.22
6. Step 6: Final answer
   x = 1,125.02