Finding the Fourth Proportional to 1,404.15, 1,937.74 and 774.70

Step by Step Solution

1. Step 1: Write the proportion equation
   1,404.15 : 1,937.74 = 774.70 : x
2. Step 2: Convert to fraction form
   1,404.15/1,937.74 = 774.70/x
3. Step 3: Cross multiply
   1,404.15x = 1,937.74 × 774.70
4. Step 4: Simplify right side
   1,404.15x = 1,501,163.30
5. Step 5: Solve for x
   x = 1,501,163.30/1,404.15
6. Step 6: Final answer
   x = 1,069.09