Finding the Fourth Proportional to 1,112.04, 1,667.94 and 381.42

Step by Step Solution

1. Step 1: Write the proportion equation
   1,112.04 : 1,667.94 = 381.42 : x
2. Step 2: Convert to fraction form
   1,112.04/1,667.94 = 381.42/x
3. Step 3: Cross multiply
   1,112.04x = 1,667.94 × 381.42
4. Step 4: Simplify right side
   1,112.04x = 636,185.67
5. Step 5: Solve for x
   x = 636,185.67/1,112.04
6. Step 6: Final answer
   x = 572.09