Finding the Fourth Proportional to 1,072.52, 1,608.78 and 379.18

Step by Step Solution

1. Step 1: Write the proportion equation
   1,072.52 : 1,608.78 = 379.18 : x
2. Step 2: Convert to fraction form
   1,072.52/1,608.78 = 379.18/x
3. Step 3: Cross multiply
   1,072.52x = 1,608.78 × 379.18
4. Step 4: Simplify right side
   1,072.52x = 610,017.20
5. Step 5: Solve for x
   x = 610,017.20/1,072.52
6. Step 6: Final answer
   x = 568.77