Finding the Fourth Proportional to 1,608.72, 2,411.34 and 1,053.21

Step by Step Solution

1. Step 1: Write the proportion equation
   1,608.72 : 2,411.34 = 1,053.21 : x
2. Step 2: Convert to fraction form
   1,608.72/2,411.34 = 1,053.21/x
3. Step 3: Cross multiply
   1,608.72x = 2,411.34 × 1,053.21
4. Step 4: Simplify right side
   1,608.72x = 2,539,647.40
5. Step 5: Solve for x
   x = 2,539,647.40/1,608.72
6. Step 6: Final answer
   x = 1,578.68