Finding the Fourth Proportional to 1,404.35, 1,938.03 and 774.90

Step by Step Solution

1. Step 1: Write the proportion equation
   1,404.35 : 1,938.03 = 774.90 : x
2. Step 2: Convert to fraction form
   1,404.35/1,938.03 = 774.90/x
3. Step 3: Cross multiply
   1,404.35x = 1,938.03 × 774.90
4. Step 4: Simplify right side
   1,404.35x = 1,501,776.54
5. Step 5: Solve for x
   x = 1,501,776.54/1,404.35
6. Step 6: Final answer
   x = 1,069.38