Finding the Fourth Proportional to 1,404.30, 1,937.98 and 774.85

Step by Step Solution

1. Step 1: Write the proportion equation
   1,404.30 : 1,937.98 = 774.85 : x
2. Step 2: Convert to fraction form
   1,404.30/1,937.98 = 774.85/x
3. Step 3: Cross multiply
   1,404.30x = 1,937.98 × 774.85
4. Step 4: Simplify right side
   1,404.30x = 1,501,639.20
5. Step 5: Solve for x
   x = 1,501,639.20/1,404.30
6. Step 6: Final answer
   x = 1,069.32