Finding the Fourth Proportional to 1,443.78, 2,162.36 and 1,277.53

Step by Step Solution

1. Step 1: Write the proportion equation
   1,443.78 : 2,162.36 = 1,277.53 : x
2. Step 2: Convert to fraction form
   1,443.78/2,162.36 = 1,277.53/x
3. Step 3: Cross multiply
   1,443.78x = 2,162.36 × 1,277.53
4. Step 4: Simplify right side
   1,443.78x = 2,762,477.56
5. Step 5: Solve for x
   x = 2,762,477.56/1,443.78
6. Step 6: Final answer
   x = 1,913.36