Finding the Fourth Proportional to 2,171.08, 3,256.69 and 669.98

Step by Step Solution

1. Step 1: Write the proportion equation
   2,171.08 : 3,256.69 = 669.98 : x
2. Step 2: Convert to fraction form
   2,171.08/3,256.69 = 669.98/x
3. Step 3: Cross multiply
   2,171.08x = 3,256.69 × 669.98
4. Step 4: Simplify right side
   2,171.08x = 2,181,917.17
5. Step 5: Solve for x
   x = 2,181,917.17/2,171.08
6. Step 6: Final answer
   x = 1,004.99