Finding the Fourth Proportional to 1,338.96, 1,847.25 and 779.34

Step by Step Solution

1. Step 1: Write the proportion equation
   1,338.96 : 1,847.25 = 779.34 : x
2. Step 2: Convert to fraction form
   1,338.96/1,847.25 = 779.34/x
3. Step 3: Cross multiply
   1,338.96x = 1,847.25 × 779.34
4. Step 4: Simplify right side
   1,338.96x = 1,439,635.82
5. Step 5: Solve for x
   x = 1,439,635.82/1,338.96
6. Step 6: Final answer
   x = 1,075.19