Finding the Fourth Proportional to 1,072.67, 1,608.86 and 292.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,072.67 : 1,608.86 = 292.72 : x
2. Step 2: Convert to fraction form
   1,072.67/1,608.86 = 292.72/x
3. Step 3: Cross multiply
   1,072.67x = 1,608.86 × 292.72
4. Step 4: Simplify right side
   1,072.67x = 470,945.50
5. Step 5: Solve for x
   x = 470,945.50/1,072.67
6. Step 6: Final answer
   x = 439.04