Finding the Fourth Proportional to 1,429.81, 2,144.72 and 699.19

Step by Step Solution

1. Step 1: Write the proportion equation
   1,429.81 : 2,144.72 = 699.19 : x
2. Step 2: Convert to fraction form
   1,429.81/2,144.72 = 699.19/x
3. Step 3: Cross multiply
   1,429.81x = 2,144.72 × 699.19
4. Step 4: Simplify right side
   1,429.81x = 1,499,563.16
5. Step 5: Solve for x
   x = 1,499,563.16/1,429.81
6. Step 6: Final answer
   x = 1,048.79