Finding the Fourth Proportional to 1,144.88, 1,716.72 and 900.68

Step by Step Solution

1. Step 1: Write the proportion equation
   1,144.88 : 1,716.72 = 900.68 : x
2. Step 2: Convert to fraction form
   1,144.88/1,716.72 = 900.68/x
3. Step 3: Cross multiply
   1,144.88x = 1,716.72 × 900.68
4. Step 4: Simplify right side
   1,144.88x = 1,546,215.37
5. Step 5: Solve for x
   x = 1,546,215.37/1,144.88
6. Step 6: Final answer
   x = 1,350.55