Finding the Fourth Proportional to 1,336.89, 1,844.19 and 839.43

Step by Step Solution

1. Step 1: Write the proportion equation
   1,336.89 : 1,844.19 = 839.43 : x
2. Step 2: Convert to fraction form
   1,336.89/1,844.19 = 839.43/x
3. Step 3: Cross multiply
   1,336.89x = 1,844.19 × 839.43
4. Step 4: Simplify right side
   1,336.89x = 1,548,068.41
5. Step 5: Solve for x
   x = 1,548,068.41/1,336.89
6. Step 6: Final answer
   x = 1,157.96