Finding the Fourth Proportional to 1,400.85, 1,933.12 and 771.34

Step by Step Solution

1. Step 1: Write the proportion equation
   1,400.85 : 1,933.12 = 771.34 : x
2. Step 2: Convert to fraction form
   1,400.85/1,933.12 = 771.34/x
3. Step 3: Cross multiply
   1,400.85x = 1,933.12 × 771.34
4. Step 4: Simplify right side
   1,400.85x = 1,491,092.78
5. Step 5: Solve for x
   x = 1,491,092.78/1,400.85
6. Step 6: Final answer
   x = 1,064.42