Finding the Fourth Proportional to 2,073.77, 3,111.09 and 687.03

Step by Step Solution

1. Step 1: Write the proportion equation
   2,073.77 : 3,111.09 = 687.03 : x
2. Step 2: Convert to fraction form
   2,073.77/3,111.09 = 687.03/x
3. Step 3: Cross multiply
   2,073.77x = 3,111.09 × 687.03
4. Step 4: Simplify right side
   2,073.77x = 2,137,396.61
5. Step 5: Solve for x
   x = 2,137,396.61/2,073.77
6. Step 6: Final answer
   x = 1,030.68