Finding the Fourth Proportional to 1,361.84, 2,042.69 and 387.82

Step by Step Solution

1. Step 1: Write the proportion equation
   1,361.84 : 2,042.69 = 387.82 : x
2. Step 2: Convert to fraction form
   1,361.84/2,042.69 = 387.82/x
3. Step 3: Cross multiply
   1,361.84x = 2,042.69 × 387.82
4. Step 4: Simplify right side
   1,361.84x = 792,196.04
5. Step 5: Solve for x
   x = 792,196.04/1,361.84
6. Step 6: Final answer
   x = 581.71