Finding the Fourth Proportional to 1,338.69, 1,847.27 and 778.98

Step by Step Solution

1. Step 1: Write the proportion equation
   1,338.69 : 1,847.27 = 778.98 : x
2. Step 2: Convert to fraction form
   1,338.69/1,847.27 = 778.98/x
3. Step 3: Cross multiply
   1,338.69x = 1,847.27 × 778.98
4. Step 4: Simplify right side
   1,338.69x = 1,438,982.49
5. Step 5: Solve for x
   x = 1,438,982.49/1,338.69
6. Step 6: Final answer
   x = 1,074.92