Finding the Fourth Proportional to 1,595.39, 2,392.82 and 815.96

Step by Step Solution

1. Step 1: Write the proportion equation
   1,595.39 : 2,392.82 = 815.96 : x
2. Step 2: Convert to fraction form
   1,595.39/2,392.82 = 815.96/x
3. Step 3: Cross multiply
   1,595.39x = 2,392.82 × 815.96
4. Step 4: Simplify right side
   1,595.39x = 1,952,454.96
5. Step 5: Solve for x
   x = 1,952,454.96/1,595.39
6. Step 6: Final answer
   x = 1,223.81