Finding the Fourth Proportional to 1,431.69, 1,974.69 and 900.06

Step by Step Solution

1. Step 1: Write the proportion equation
   1,431.69 : 1,974.69 = 900.06 : x
2. Step 2: Convert to fraction form
   1,431.69/1,974.69 = 900.06/x
3. Step 3: Cross multiply
   1,431.69x = 1,974.69 × 900.06
4. Step 4: Simplify right side
   1,431.69x = 1,777,339.48
5. Step 5: Solve for x
   x = 1,777,339.48/1,431.69
6. Step 6: Final answer
   x = 1,241.43