Finding the Fourth Proportional to 1,363.42, 1,880.17 and 839.35

Step by Step Solution

1. Step 1: Write the proportion equation
   1,363.42 : 1,880.17 = 839.35 : x
2. Step 2: Convert to fraction form
   1,363.42/1,880.17 = 839.35/x
3. Step 3: Cross multiply
   1,363.42x = 1,880.17 × 839.35
4. Step 4: Simplify right side
   1,363.42x = 1,578,120.69
5. Step 5: Solve for x
   x = 1,578,120.69/1,363.42
6. Step 6: Final answer
   x = 1,157.47