Finding the Fourth Proportional to 2,013.57, 2,778.71 and 1,129.46

Step by Step Solution

1. Step 1: Write the proportion equation
   2,013.57 : 2,778.71 = 1,129.46 : x
2. Step 2: Convert to fraction form
   2,013.57/2,778.71 = 1,129.46/x
3. Step 3: Cross multiply
   2,013.57x = 2,778.71 × 1,129.46
4. Step 4: Simplify right side
   2,013.57x = 3,138,422.26
5. Step 5: Solve for x
   x = 3,138,422.26/2,013.57
6. Step 6: Final answer
   x = 1,558.64