Finding the Fourth Proportional to 1,329.30, 1,992.69 and 670.74

Step by Step Solution

1. Step 1: Write the proportion equation
   1,329.30 : 1,992.69 = 670.74 : x
2. Step 2: Convert to fraction form
   1,329.30/1,992.69 = 670.74/x
3. Step 3: Cross multiply
   1,329.30x = 1,992.69 × 670.74
4. Step 4: Simplify right side
   1,329.30x = 1,336,576.89
5. Step 5: Solve for x
   x = 1,336,576.89/1,329.30
6. Step 6: Final answer
   x = 1,005.47