Finding the Fourth Proportional to 1,422.09, 1,962.63 and 897.75

Step by Step Solution

1. Step 1: Write the proportion equation
   1,422.09 : 1,962.63 = 897.75 : x
2. Step 2: Convert to fraction form
   1,422.09/1,962.63 = 897.75/x
3. Step 3: Cross multiply
   1,422.09x = 1,962.63 × 897.75
4. Step 4: Simplify right side
   1,422.09x = 1,761,951.08
5. Step 5: Solve for x
   x = 1,761,951.08/1,422.09
6. Step 6: Final answer
   x = 1,238.99