Finding the Fourth Proportional to 1,359.26, 1,874.42 and 1,209.42

Step by Step Solution

1. Step 1: Write the proportion equation
   1,359.26 : 1,874.42 = 1,209.42 : x
2. Step 2: Convert to fraction form
   1,359.26/1,874.42 = 1,209.42/x
3. Step 3: Cross multiply
   1,359.26x = 1,874.42 × 1,209.42
4. Step 4: Simplify right side
   1,359.26x = 2,266,961.04
5. Step 5: Solve for x
   x = 2,266,961.04/1,359.26
6. Step 6: Final answer
   x = 1,667.79