Finding the Fourth Proportional to 2,773.60, 4,156.81 and 1,128.24

Step by Step Solution

1. Step 1: Write the proportion equation
   2,773.60 : 4,156.81 = 1,128.24 : x
2. Step 2: Convert to fraction form
   2,773.60/4,156.81 = 1,128.24/x
3. Step 3: Cross multiply
   2,773.60x = 4,156.81 × 1,128.24
4. Step 4: Simplify right side
   2,773.60x = 4,689,879.31
5. Step 5: Solve for x
   x = 4,689,879.31/2,773.60
6. Step 6: Final answer
   x = 1,690.90