Finding the Fourth Proportional to 2,003.67, 3,003.39 and 687.02

Step by Step Solution

1. Step 1: Write the proportion equation
   2,003.67 : 3,003.39 = 687.02 : x
2. Step 2: Convert to fraction form
   2,003.67/3,003.39 = 687.02/x
3. Step 3: Cross multiply
   2,003.67x = 3,003.39 × 687.02
4. Step 4: Simplify right side
   2,003.67x = 2,063,373.98
5. Step 5: Solve for x
   x = 2,063,373.98/2,003.67
6. Step 6: Final answer
   x = 1,029.80