Finding the Fourth Proportional to 2,132.40, 3,196.20 and 899.60

Step by Step Solution

1. Step 1: Write the proportion equation
   2,132.40 : 3,196.20 = 899.60 : x
2. Step 2: Convert to fraction form
   2,132.40/3,196.20 = 899.60/x
3. Step 3: Cross multiply
   2,132.40x = 3,196.20 × 899.60
4. Step 4: Simplify right side
   2,132.40x = 2,875,301.52
5. Step 5: Solve for x
   x = 2,875,301.52/2,132.40
6. Step 6: Final answer
   x = 1,348.39