Finding the Fourth Proportional to 1,369.41, 1,890.03 and 779.86

Step by Step Solution

1. Step 1: Write the proportion equation
   1,369.41 : 1,890.03 = 779.86 : x
2. Step 2: Convert to fraction form
   1,369.41/1,890.03 = 779.86/x
3. Step 3: Cross multiply
   1,369.41x = 1,890.03 × 779.86
4. Step 4: Simplify right side
   1,369.41x = 1,473,958.80
5. Step 5: Solve for x
   x = 1,473,958.80/1,369.41
6. Step 6: Final answer
   x = 1,076.35