Finding the Fourth Proportional to 1,112.07, 1,667.62 and 454.09

Step by Step Solution

1. Step 1: Write the proportion equation
   1,112.07 : 1,667.62 = 454.09 : x
2. Step 2: Convert to fraction form
   1,112.07/1,667.62 = 454.09/x
3. Step 3: Cross multiply
   1,112.07x = 1,667.62 × 454.09
4. Step 4: Simplify right side
   1,112.07x = 757,249.57
5. Step 5: Solve for x
   x = 757,249.57/1,112.07
6. Step 6: Final answer
   x = 680.94