Finding the Fourth Proportional to 3,436.42, 5,154.58 and 839.38

Step by Step Solution

1. Step 1: Write the proportion equation
   3,436.42 : 5,154.58 = 839.38 : x
2. Step 2: Convert to fraction form
   3,436.42/5,154.58 = 839.38/x
3. Step 3: Cross multiply
   3,436.42x = 5,154.58 × 839.38
4. Step 4: Simplify right side
   3,436.42x = 4,326,639.52
5. Step 5: Solve for x
   x = 4,326,639.52/3,436.42
6. Step 6: Final answer
   x = 1,259.06