Finding the Fourth Proportional to 2,688.03, 4,032.18 and 839.34

Step by Step Solution

1. Step 1: Write the proportion equation
   2,688.03 : 4,032.18 = 839.34 : x
2. Step 2: Convert to fraction form
   2,688.03/4,032.18 = 839.34/x
3. Step 3: Cross multiply
   2,688.03x = 4,032.18 × 839.34
4. Step 4: Simplify right side
   2,688.03x = 3,384,369.96
5. Step 5: Solve for x
   x = 3,384,369.96/2,688.03
6. Step 6: Final answer
   x = 1,259.05