Finding the Fourth Proportional to 1,936.48, 2,903.60 and 1,321.12

Step by Step Solution

1. Step 1: Write the proportion equation
   1,936.48 : 2,903.60 = 1,321.12 : x
2. Step 2: Convert to fraction form
   1,936.48/2,903.60 = 1,321.12/x
3. Step 3: Cross multiply
   1,936.48x = 2,903.60 × 1,321.12
4. Step 4: Simplify right side
   1,936.48x = 3,836,004.03
5. Step 5: Solve for x
   x = 3,836,004.03/1,936.48
6. Step 6: Final answer
   x = 1,980.92