Finding the Fourth Proportional to 1,369.34, 1,889.43 and 779.86

Step by Step Solution

1. Step 1: Write the proportion equation
   1,369.34 : 1,889.43 = 779.86 : x
2. Step 2: Convert to fraction form
   1,369.34/1,889.43 = 779.86/x
3. Step 3: Cross multiply
   1,369.34x = 1,889.43 × 779.86
4. Step 4: Simplify right side
   1,369.34x = 1,473,490.32
5. Step 5: Solve for x
   x = 1,473,490.32/1,369.34
6. Step 6: Final answer
   x = 1,076.06