Finding the Fourth Proportional to 1,608.03, 2,219.16 and 978.46

Step by Step Solution

1. Step 1: Write the proportion equation
   1,608.03 : 2,219.16 = 978.46 : x
2. Step 2: Convert to fraction form
   1,608.03/2,219.16 = 978.46/x
3. Step 3: Cross multiply
   1,608.03x = 2,219.16 × 978.46
4. Step 4: Simplify right side
   1,608.03x = 2,171,357.41
5. Step 5: Solve for x
   x = 2,171,357.41/1,608.03
6. Step 6: Final answer
   x = 1,350.32