Finding the Fourth Proportional to 1,447.71, 2,163.50 and 1,078.35

Step by Step Solution

1. Step 1: Write the proportion equation
   1,447.71 : 2,163.50 = 1,078.35 : x
2. Step 2: Convert to fraction form
   1,447.71/2,163.50 = 1,078.35/x
3. Step 3: Cross multiply
   1,447.71x = 2,163.50 × 1,078.35
4. Step 4: Simplify right side
   1,447.71x = 2,333,004.83
5. Step 5: Solve for x
   x = 2,333,004.83/1,447.71
6. Step 6: Final answer
   x = 1,611.51