Finding the Fourth Proportional to 1,019.34, 1,399.19 and 906.35

Step by Step Solution

1. Step 1: Write the proportion equation
   1,019.34 : 1,399.19 = 906.35 : x
2. Step 2: Convert to fraction form
   1,019.34/1,399.19 = 906.35/x
3. Step 3: Cross multiply
   1,019.34x = 1,399.19 × 906.35
4. Step 4: Simplify right side
   1,019.34x = 1,268,144.33
5. Step 5: Solve for x
   x = 1,268,144.33/1,019.34
6. Step 6: Final answer
   x = 1,244.08