Finding the Fourth Proportional to 2,231.91, 3,078.80 and 1,422.86

Step by Step Solution

1. Step 1: Write the proportion equation
   2,231.91 : 3,078.80 = 1,422.86 : x
2. Step 2: Convert to fraction form
   2,231.91/3,078.80 = 1,422.86/x
3. Step 3: Cross multiply
   2,231.91x = 3,078.80 × 1,422.86
4. Step 4: Simplify right side
   2,231.91x = 4,380,678.86
5. Step 5: Solve for x
   x = 4,380,678.86/2,231.91
6. Step 6: Final answer
   x = 1,962.75