Finding the Fourth Proportional to 1,996.38, 2,990.82 and 1,172.19

Step by Step Solution

1. Step 1: Write the proportion equation
   1,996.38 : 2,990.82 = 1,172.19 : x
2. Step 2: Convert to fraction form
   1,996.38/2,990.82 = 1,172.19/x
3. Step 3: Cross multiply
   1,996.38x = 2,990.82 × 1,172.19
4. Step 4: Simplify right side
   1,996.38x = 3,505,809.30
5. Step 5: Solve for x
   x = 3,505,809.30/1,996.38
6. Step 6: Final answer
   x = 1,756.08