Finding the Fourth Proportional to 2,003.71, 3,005.49 and 687.03

Step by Step Solution

1. Step 1: Write the proportion equation
   2,003.71 : 3,005.49 = 687.03 : x
2. Step 2: Convert to fraction form
   2,003.71/3,005.49 = 687.03/x
3. Step 3: Cross multiply
   2,003.71x = 3,005.49 × 687.03
4. Step 4: Simplify right side
   2,003.71x = 2,064,861.79
5. Step 5: Solve for x
   x = 2,064,861.79/2,003.71
6. Step 6: Final answer
   x = 1,030.52