Finding the Fourth Proportional to 1,429.61, 2,142.89 and 935.42

Step by Step Solution

1. Step 1: Write the proportion equation
   1,429.61 : 2,142.89 = 935.42 : x
2. Step 2: Convert to fraction form
   1,429.61/2,142.89 = 935.42/x
3. Step 3: Cross multiply
   1,429.61x = 2,142.89 × 935.42
4. Step 4: Simplify right side
   1,429.61x = 2,004,497.49
5. Step 5: Solve for x
   x = 2,004,497.49/1,429.61
6. Step 6: Final answer
   x = 1,402.13