Finding the Fourth Proportional to 1,422.83, 2,135.03 and 1,078.31

Step by Step Solution

1. Step 1: Write the proportion equation
   1,422.83 : 2,135.03 = 1,078.31 : x
2. Step 2: Convert to fraction form
   1,422.83/2,135.03 = 1,078.31/x
3. Step 3: Cross multiply
   1,422.83x = 2,135.03 × 1,078.31
4. Step 4: Simplify right side
   1,422.83x = 2,302,224.15
5. Step 5: Solve for x
   x = 2,302,224.15/1,422.83
6. Step 6: Final answer
   x = 1,618.06