Finding the Fourth Proportional to 1,376.27, 1,899.35 and 786.83

Step by Step Solution

1. Step 1: Write the proportion equation
   1,376.27 : 1,899.35 = 786.83 : x
2. Step 2: Convert to fraction form
   1,376.27/1,899.35 = 786.83/x
3. Step 3: Cross multiply
   1,376.27x = 1,899.35 × 786.83
4. Step 4: Simplify right side
   1,376.27x = 1,494,452.13
5. Step 5: Solve for x
   x = 1,494,452.13/1,376.27
6. Step 6: Final answer
   x = 1,085.88