Finding the Fourth Proportional to 1,376.03, 1,899.03 and 786.75

Step by Step Solution

1. Step 1: Write the proportion equation
   1,376.03 : 1,899.03 = 786.75 : x
2. Step 2: Convert to fraction form
   1,376.03/1,899.03 = 786.75/x
3. Step 3: Cross multiply
   1,376.03x = 1,899.03 × 786.75
4. Step 4: Simplify right side
   1,376.03x = 1,494,061.85
5. Step 5: Solve for x
   x = 1,494,061.85/1,376.03
6. Step 6: Final answer
   x = 1,085.78