Finding the Fourth Proportional to 1,384.96, 2,078.34 and 1,273.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,384.96 : 2,078.34 = 1,273.72 : x
2. Step 2: Convert to fraction form
   1,384.96/2,078.34 = 1,273.72/x
3. Step 3: Cross multiply
   1,384.96x = 2,078.34 × 1,273.72
4. Step 4: Simplify right side
   1,384.96x = 2,647,223.22
5. Step 5: Solve for x
   x = 2,647,223.22/1,384.96
6. Step 6: Final answer
   x = 1,911.41