Finding the Fourth Proportional to 1,111.62, 1,667.68 and 331.58

Step by Step Solution

1. Step 1: Write the proportion equation
   1,111.62 : 1,667.68 = 331.58 : x
2. Step 2: Convert to fraction form
   1,111.62/1,667.68 = 331.58/x
3. Step 3: Cross multiply
   1,111.62x = 1,667.68 × 331.58
4. Step 4: Simplify right side
   1,111.62x = 552,969.33
5. Step 5: Solve for x
   x = 552,969.33/1,111.62
6. Step 6: Final answer
   x = 497.44