Finding the Fourth Proportional to 2,013.16, 2,778.24 and 1,128.96

Step by Step Solution

1. Step 1: Write the proportion equation
   2,013.16 : 2,778.24 = 1,128.96 : x
2. Step 2: Convert to fraction form
   2,013.16/2,778.24 = 1,128.96/x
3. Step 3: Cross multiply
   2,013.16x = 2,778.24 × 1,128.96
4. Step 4: Simplify right side
   2,013.16x = 3,136,521.83
5. Step 5: Solve for x
   x = 3,136,521.83/2,013.16
6. Step 6: Final answer
   x = 1,558.01