Finding the Fourth Proportional to 1,381.14, 2,073.72 and 863.34

Step by Step Solution

1. Step 1: Write the proportion equation
   1,381.14 : 2,073.72 = 863.34 : x
2. Step 2: Convert to fraction form
   1,381.14/2,073.72 = 863.34/x
3. Step 3: Cross multiply
   1,381.14x = 2,073.72 × 863.34
4. Step 4: Simplify right side
   1,381.14x = 1,790,325.42
5. Step 5: Solve for x
   x = 1,790,325.42/1,381.14
6. Step 6: Final answer
   x = 1,296.27