Finding the Fourth Proportional to 2,039.39, 2,813.97 and 1,242.55

Step by Step Solution

1. Step 1: Write the proportion equation
   2,039.39 : 2,813.97 = 1,242.55 : x
2. Step 2: Convert to fraction form
   2,039.39/2,813.97 = 1,242.55/x
3. Step 3: Cross multiply
   2,039.39x = 2,813.97 × 1,242.55
4. Step 4: Simplify right side
   2,039.39x = 3,496,498.42
5. Step 5: Solve for x
   x = 3,496,498.42/2,039.39
6. Step 6: Final answer
   x = 1,714.48