Finding the Fourth Proportional to 1,608.72, 2,411.28 and 1,061.28

Step by Step Solution

1. Step 1: Write the proportion equation
   1,608.72 : 2,411.28 = 1,061.28 : x
2. Step 2: Convert to fraction form
   1,608.72/2,411.28 = 1,061.28/x
3. Step 3: Cross multiply
   1,608.72x = 2,411.28 × 1,061.28
4. Step 4: Simplify right side
   1,608.72x = 2,559,043.24
5. Step 5: Solve for x
   x = 2,559,043.24/1,608.72
6. Step 6: Final answer
   x = 1,590.73