Finding the Fourth Proportional to 1,371.18, 1,892.84 and 874.50

Step by Step Solution

1. Step 1: Write the proportion equation
   1,371.18 : 1,892.84 = 874.50 : x
2. Step 2: Convert to fraction form
   1,371.18/1,892.84 = 874.50/x
3. Step 3: Cross multiply
   1,371.18x = 1,892.84 × 874.50
4. Step 4: Simplify right side
   1,371.18x = 1,655,288.58
5. Step 5: Solve for x
   x = 1,655,288.58/1,371.18
6. Step 6: Final answer
   x = 1,207.20