Finding the Fourth Proportional to 1,336.75, 1,990.46 and 1,322.06

Step by Step Solution

1. Step 1: Write the proportion equation
   1,336.75 : 1,990.46 = 1,322.06 : x
2. Step 2: Convert to fraction form
   1,336.75/1,990.46 = 1,322.06/x
3. Step 3: Cross multiply
   1,336.75x = 1,990.46 × 1,322.06
4. Step 4: Simplify right side
   1,336.75x = 2,631,500.90
5. Step 5: Solve for x
   x = 2,631,500.90/1,336.75
6. Step 6: Final answer
   x = 1,968.58