Finding the Fourth Proportional to 2,013.22, 2,778.18 and 1,129.10

Step by Step Solution

1. Step 1: Write the proportion equation
   2,013.22 : 2,778.18 = 1,129.10 : x
2. Step 2: Convert to fraction form
   2,013.22/2,778.18 = 1,129.10/x
3. Step 3: Cross multiply
   2,013.22x = 2,778.18 × 1,129.10
4. Step 4: Simplify right side
   2,013.22x = 3,136,843.04
5. Step 5: Solve for x
   x = 3,136,843.04/2,013.22
6. Step 6: Final answer
   x = 1,558.12