Finding the Fourth Proportional to 1,384.49, 2,078.56 and 726.87

Step by Step Solution

1. Step 1: Write the proportion equation
   1,384.49 : 2,078.56 = 726.87 : x
2. Step 2: Convert to fraction form
   1,384.49/2,078.56 = 726.87/x
3. Step 3: Cross multiply
   1,384.49x = 2,078.56 × 726.87
4. Step 4: Simplify right side
   1,384.49x = 1,510,851.61
5. Step 5: Solve for x
   x = 1,510,851.61/1,384.49
6. Step 6: Final answer
   x = 1,091.27