Finding the Fourth Proportional to 1,608.78, 2,219.74 and 1,019.10

Step by Step Solution

1. Step 1: Write the proportion equation
   1,608.78 : 2,219.74 = 1,019.10 : x
2. Step 2: Convert to fraction form
   1,608.78/2,219.74 = 1,019.10/x
3. Step 3: Cross multiply
   1,608.78x = 2,219.74 × 1,019.10
4. Step 4: Simplify right side
   1,608.78x = 2,262,137.03
5. Step 5: Solve for x
   x = 2,262,137.03/1,608.78
6. Step 6: Final answer
   x = 1,406.12