Finding the Fourth Proportional to 1,422.88, 1,963.56 and 899.34

Step by Step Solution

1. Step 1: Write the proportion equation
   1,422.88 : 1,963.56 = 899.34 : x
2. Step 2: Convert to fraction form
   1,422.88/1,963.56 = 899.34/x
3. Step 3: Cross multiply
   1,422.88x = 1,963.56 × 899.34
4. Step 4: Simplify right side
   1,422.88x = 1,765,908.05
5. Step 5: Solve for x
   x = 1,765,908.05/1,422.88
6. Step 6: Final answer
   x = 1,241.08