Finding the Fourth Proportional to 2,110.42, 3,164.55 and 1,123.80

Step by Step Solution

1. Step 1: Write the proportion equation
   2,110.42 : 3,164.55 = 1,123.80 : x
2. Step 2: Convert to fraction form
   2,110.42/3,164.55 = 1,123.80/x
3. Step 3: Cross multiply
   2,110.42x = 3,164.55 × 1,123.80
4. Step 4: Simplify right side
   2,110.42x = 3,556,310.83
5. Step 5: Solve for x
   x = 3,556,310.83/2,110.42
6. Step 6: Final answer
   x = 1,685.12