Finding the Fourth Proportional to 1,952.78, 2,693.72 and 1,289.39

Step by Step Solution

1. Step 1: Write the proportion equation
   1,952.78 : 2,693.72 = 1,289.39 : x
2. Step 2: Convert to fraction form
   1,952.78/2,693.72 = 1,289.39/x
3. Step 3: Cross multiply
   1,952.78x = 2,693.72 × 1,289.39
4. Step 4: Simplify right side
   1,952.78x = 3,473,245.39
5. Step 5: Solve for x
   x = 3,473,245.39/1,952.78
6. Step 6: Final answer
   x = 1,778.62