Finding the Fourth Proportional to 1,429.23, 2,144.56 and 698.79

Step by Step Solution

1. Step 1: Write the proportion equation
   1,429.23 : 2,144.56 = 698.79 : x
2. Step 2: Convert to fraction form
   1,429.23/2,144.56 = 698.79/x
3. Step 3: Cross multiply
   1,429.23x = 2,144.56 × 698.79
4. Step 4: Simplify right side
   1,429.23x = 1,498,597.08
5. Step 5: Solve for x
   x = 1,498,597.08/1,429.23
6. Step 6: Final answer
   x = 1,048.53