Finding the Fourth Proportional to 2,132.81, 3,200.12 and 900.49

Step by Step Solution

1. Step 1: Write the proportion equation
   2,132.81 : 3,200.12 = 900.49 : x
2. Step 2: Convert to fraction form
   2,132.81/3,200.12 = 900.49/x
3. Step 3: Cross multiply
   2,132.81x = 3,200.12 × 900.49
4. Step 4: Simplify right side
   2,132.81x = 2,881,676.06
5. Step 5: Solve for x
   x = 2,881,676.06/2,132.81
6. Step 6: Final answer
   x = 1,351.12