Finding the Fourth Proportional to 1,386.05, 1,911.89 and 944.15

Step by Step Solution

1. Step 1: Write the proportion equation
   1,386.05 : 1,911.89 = 944.15 : x
2. Step 2: Convert to fraction form
   1,386.05/1,911.89 = 944.15/x
3. Step 3: Cross multiply
   1,386.05x = 1,911.89 × 944.15
4. Step 4: Simplify right side
   1,386.05x = 1,805,103.74
5. Step 5: Solve for x
   x = 1,805,103.74/1,386.05
6. Step 6: Final answer
   x = 1,302.34