Finding the Fourth Proportional to 1,369.01, 1,889.25 and 779.58

Step by Step Solution

1. Step 1: Write the proportion equation
   1,369.01 : 1,889.25 = 779.58 : x
2. Step 2: Convert to fraction form
   1,369.01/1,889.25 = 779.58/x
3. Step 3: Cross multiply
   1,369.01x = 1,889.25 × 779.58
4. Step 4: Simplify right side
   1,369.01x = 1,472,818.59
5. Step 5: Solve for x
   x = 1,472,818.59/1,369.01
6. Step 6: Final answer
   x = 1,075.83