Finding the Fourth Proportional to 2,130.82, 3,196.39 and 669.94

Step by Step Solution

1. Step 1: Write the proportion equation
   2,130.82 : 3,196.39 = 669.94 : x
2. Step 2: Convert to fraction form
   2,130.82/3,196.39 = 669.94/x
3. Step 3: Cross multiply
   2,130.82x = 3,196.39 × 669.94
4. Step 4: Simplify right side
   2,130.82x = 2,141,379.22
5. Step 5: Solve for x
   x = 2,141,379.22/2,130.82
6. Step 6: Final answer
   x = 1,004.95