Finding the Fourth Proportional to 1,366.78, 1,886.05 and 835.62

Step by Step Solution

1. Step 1: Write the proportion equation
   1,366.78 : 1,886.05 = 835.62 : x
2. Step 2: Convert to fraction form
   1,366.78/1,886.05 = 835.62/x
3. Step 3: Cross multiply
   1,366.78x = 1,886.05 × 835.62
4. Step 4: Simplify right side
   1,366.78x = 1,576,021.10
5. Step 5: Solve for x
   x = 1,576,021.10/1,366.78
6. Step 6: Final answer
   x = 1,153.09