Finding the Fourth Proportional to 1,429.04, 2,142.12 and 687.56

Step by Step Solution

1. Step 1: Write the proportion equation
   1,429.04 : 2,142.12 = 687.56 : x
2. Step 2: Convert to fraction form
   1,429.04/2,142.12 = 687.56/x
3. Step 3: Cross multiply
   1,429.04x = 2,142.12 × 687.56
4. Step 4: Simplify right side
   1,429.04x = 1,472,844.04
5. Step 5: Solve for x
   x = 1,472,844.04/1,429.04
6. Step 6: Final answer
   x = 1,030.65