Finding the Fourth Proportional to 2,097.82, 3,147.81 and 1,172.80

Step by Step Solution

1. Step 1: Write the proportion equation
   2,097.82 : 3,147.81 = 1,172.80 : x
2. Step 2: Convert to fraction form
   2,097.82/3,147.81 = 1,172.80/x
3. Step 3: Cross multiply
   2,097.82x = 3,147.81 × 1,172.80
4. Step 4: Simplify right side
   2,097.82x = 3,691,751.57
5. Step 5: Solve for x
   x = 3,691,751.57/2,097.82
6. Step 6: Final answer
   x = 1,759.80