Finding the Fourth Proportional to 1,321.02, 1,812.96 and 1,196.42

Step by Step Solution

1. Step 1: Write the proportion equation
   1,321.02 : 1,812.96 = 1,196.42 : x
2. Step 2: Convert to fraction form
   1,321.02/1,812.96 = 1,196.42/x
3. Step 3: Cross multiply
   1,321.02x = 1,812.96 × 1,196.42
4. Step 4: Simplify right side
   1,321.02x = 2,169,052.54
5. Step 5: Solve for x
   x = 2,169,052.54/1,321.02
6. Step 6: Final answer
   x = 1,641.95