Finding the Fourth Proportional to 1,112.23, 1,667.76 and 381.52

Step by Step Solution

1. Step 1: Write the proportion equation
   1,112.23 : 1,667.76 = 381.52 : x
2. Step 2: Convert to fraction form
   1,112.23/1,667.76 = 381.52/x
3. Step 3: Cross multiply
   1,112.23x = 1,667.76 × 381.52
4. Step 4: Simplify right side
   1,112.23x = 636,283.80
5. Step 5: Solve for x
   x = 636,283.80/1,112.23
6. Step 6: Final answer
   x = 572.08