Finding the Fourth Proportional to 1,550.40, 2,138.72 and 1,019.28

Step by Step Solution

1. Step 1: Write the proportion equation
   1,550.40 : 2,138.72 = 1,019.28 : x
2. Step 2: Convert to fraction form
   1,550.40/2,138.72 = 1,019.28/x
3. Step 3: Cross multiply
   1,550.40x = 2,138.72 × 1,019.28
4. Step 4: Simplify right side
   1,550.40x = 2,179,954.52
5. Step 5: Solve for x
   x = 2,179,954.52/1,550.40
6. Step 6: Final answer
   x = 1,406.06