Finding the Fourth Proportional to 1,045.97, 1,566.83 and 839.42

Step by Step Solution

1. Step 1: Write the proportion equation
   1,045.97 : 1,566.83 = 839.42 : x
2. Step 2: Convert to fraction form
   1,045.97/1,566.83 = 839.42/x
3. Step 3: Cross multiply
   1,045.97x = 1,566.83 × 839.42
4. Step 4: Simplify right side
   1,045.97x = 1,315,234.45
5. Step 5: Solve for x
   x = 1,315,234.45/1,045.97
6. Step 6: Final answer
   x = 1,257.43