Finding the Fourth Proportional to 2,130.39, 3,196.08 and 669.69

Step by Step Solution

1. Step 1: Write the proportion equation
   2,130.39 : 3,196.08 = 669.69 : x
2. Step 2: Convert to fraction form
   2,130.39/3,196.08 = 669.69/x
3. Step 3: Cross multiply
   2,130.39x = 3,196.08 × 669.69
4. Step 4: Simplify right side
   2,130.39x = 2,140,382.82
5. Step 5: Solve for x
   x = 2,140,382.82/2,130.39
6. Step 6: Final answer
   x = 1,004.69