Finding the Fourth Proportional to 2,171.97, 2,997.72 and 1,240.47

Step by Step Solution

1. Step 1: Write the proportion equation
   2,171.97 : 2,997.72 = 1,240.47 : x
2. Step 2: Convert to fraction form
   2,171.97/2,997.72 = 1,240.47/x
3. Step 3: Cross multiply
   2,171.97x = 2,997.72 × 1,240.47
4. Step 4: Simplify right side
   2,171.97x = 3,718,581.73
5. Step 5: Solve for x
   x = 3,718,581.73/2,171.97
6. Step 6: Final answer
   x = 1,712.08