Finding the Fourth Proportional to 2,131.72, 3,196.44 and 670.48

Step by Step Solution

1. Step 1: Write the proportion equation
   2,131.72 : 3,196.44 = 670.48 : x
2. Step 2: Convert to fraction form
   2,131.72/3,196.44 = 670.48/x
3. Step 3: Cross multiply
   2,131.72x = 3,196.44 × 670.48
4. Step 4: Simplify right side
   2,131.72x = 2,143,149.09
5. Step 5: Solve for x
   x = 2,143,149.09/2,131.72
6. Step 6: Final answer
   x = 1,005.36