Finding the Fourth Proportional to 1,404.39, 1,938.09 and 774.95

Step by Step Solution

1. Step 1: Write the proportion equation
   1,404.39 : 1,938.09 = 774.95 : x
2. Step 2: Convert to fraction form
   1,404.39/1,938.09 = 774.95/x
3. Step 3: Cross multiply
   1,404.39x = 1,938.09 × 774.95
4. Step 4: Simplify right side
   1,404.39x = 1,501,922.85
5. Step 5: Solve for x
   x = 1,501,922.85/1,404.39
6. Step 6: Final answer
   x = 1,069.45