Finding the Fourth Proportional to 1,608.51, 2,219.20 and 1,018.96

Step by Step Solution

1. Step 1: Write the proportion equation
   1,608.51 : 2,219.20 = 1,018.96 : x
2. Step 2: Convert to fraction form
   1,608.51/2,219.20 = 1,018.96/x
3. Step 3: Cross multiply
   1,608.51x = 2,219.20 × 1,018.96
4. Step 4: Simplify right side
   1,608.51x = 2,261,276.03
5. Step 5: Solve for x
   x = 2,261,276.03/1,608.51
6. Step 6: Final answer
   x = 1,405.82