Finding the Fourth Proportional to 2,661.64, 3,996.90 and 2,003.50

Step by Step Solution

1. Step 1: Write the proportion equation
   2,661.64 : 3,996.90 = 2,003.50 : x
2. Step 2: Convert to fraction form
   2,661.64/3,996.90 = 2,003.50/x
3. Step 3: Cross multiply
   2,661.64x = 3,996.90 × 2,003.50
4. Step 4: Simplify right side
   2,661.64x = 8,007,789.15
5. Step 5: Solve for x
   x = 8,007,789.15/2,661.64
6. Step 6: Final answer
   x = 3,008.59