Finding the Fourth Proportional to 1,422.38, 2,132.89 and 805.92

Step by Step Solution

1. Step 1: Write the proportion equation
   1,422.38 : 2,132.89 = 805.92 : x
2. Step 2: Convert to fraction form
   1,422.38/2,132.89 = 805.92/x
3. Step 3: Cross multiply
   1,422.38x = 2,132.89 × 805.92
4. Step 4: Simplify right side
   1,422.38x = 1,718,924.01
5. Step 5: Solve for x
   x = 1,718,924.01/1,422.38
6. Step 6: Final answer
   x = 1,208.49