Finding the Fourth Proportional to 1,363.59, 1,880.96 and 839.25

Step by Step Solution

1. Step 1: Write the proportion equation
   1,363.59 : 1,880.96 = 839.25 : x
2. Step 2: Convert to fraction form
   1,363.59/1,880.96 = 839.25/x
3. Step 3: Cross multiply
   1,363.59x = 1,880.96 × 839.25
4. Step 4: Simplify right side
   1,363.59x = 1,578,591.48
5. Step 5: Solve for x
   x = 1,578,591.48/1,363.59
6. Step 6: Final answer
   x = 1,157.67