Finding the Fourth Proportional to 1,423.38, 1,961.64 and 1,029.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,423.38 : 1,961.64 = 1,029.72 : x
2. Step 2: Convert to fraction form
   1,423.38/1,961.64 = 1,029.72/x
3. Step 3: Cross multiply
   1,423.38x = 1,961.64 × 1,029.72
4. Step 4: Simplify right side
   1,423.38x = 2,019,939.94
5. Step 5: Solve for x
   x = 2,019,939.94/1,423.38
6. Step 6: Final answer
   x = 1,419.12