Finding the Fourth Proportional to 2,013.25, 2,778.06 and 1,128.93

Step by Step Solution

1. Step 1: Write the proportion equation
   2,013.25 : 2,778.06 = 1,128.93 : x
2. Step 2: Convert to fraction form
   2,013.25/2,778.06 = 1,128.93/x
3. Step 3: Cross multiply
   2,013.25x = 2,778.06 × 1,128.93
4. Step 4: Simplify right side
   2,013.25x = 3,136,235.28
5. Step 5: Solve for x
   x = 3,136,235.28/2,013.25
6. Step 6: Final answer
   x = 1,557.80