Finding the Fourth Proportional to 1,371.74, 1,892.46 and 874.30

Step by Step Solution

1. Step 1: Write the proportion equation
   1,371.74 : 1,892.46 = 874.30 : x
2. Step 2: Convert to fraction form
   1,371.74/1,892.46 = 874.30/x
3. Step 3: Cross multiply
   1,371.74x = 1,892.46 × 874.30
4. Step 4: Simplify right side
   1,371.74x = 1,654,577.78
5. Step 5: Solve for x
   x = 1,654,577.78/1,371.74
6. Step 6: Final answer
   x = 1,206.19