Finding the Fourth Proportional to 2,131.74, 3,196.60 and 670.97

Step by Step Solution

1. Step 1: Write the proportion equation
   2,131.74 : 3,196.60 = 670.97 : x
2. Step 2: Convert to fraction form
   2,131.74/3,196.60 = 670.97/x
3. Step 3: Cross multiply
   2,131.74x = 3,196.60 × 670.97
4. Step 4: Simplify right side
   2,131.74x = 2,144,829.02
5. Step 5: Solve for x
   x = 2,144,829.02/2,131.74
6. Step 6: Final answer
   x = 1,006.14