Finding the Fourth Proportional to 1,665.82, 2,297.64 and 1,272.16

Step by Step Solution

1. Step 1: Write the proportion equation
   1,665.82 : 2,297.64 = 1,272.16 : x
2. Step 2: Convert to fraction form
   1,665.82/2,297.64 = 1,272.16/x
3. Step 3: Cross multiply
   1,665.82x = 2,297.64 × 1,272.16
4. Step 4: Simplify right side
   1,665.82x = 2,922,965.70
5. Step 5: Solve for x
   x = 2,922,965.70/1,665.82
6. Step 6: Final answer
   x = 1,754.67