Finding the Fourth Proportional to 1,854.42, 2,780.27 and 1,123.86

Step by Step Solution

1. Step 1: Write the proportion equation
   1,854.42 : 2,780.27 = 1,123.86 : x
2. Step 2: Convert to fraction form
   1,854.42/2,780.27 = 1,123.86/x
3. Step 3: Cross multiply
   1,854.42x = 2,780.27 × 1,123.86
4. Step 4: Simplify right side
   1,854.42x = 3,124,634.24
5. Step 5: Solve for x
   x = 3,124,634.24/1,854.42
6. Step 6: Final answer
   x = 1,684.97