Finding the Fourth Proportional to 1,608.72, 2,412.20 and 742.26

Step by Step Solution

1. Step 1: Write the proportion equation
   1,608.72 : 2,412.20 = 742.26 : x
2. Step 2: Convert to fraction form
   1,608.72/2,412.20 = 742.26/x
3. Step 3: Cross multiply
   1,608.72x = 2,412.20 × 742.26
4. Step 4: Simplify right side
   1,608.72x = 1,790,479.57
5. Step 5: Solve for x
   x = 1,790,479.57/1,608.72
6. Step 6: Final answer
   x = 1,112.98