Finding the Fourth Proportional to 1,664.82, 2,297.46 and 918.78

Step by Step Solution

1. Step 1: Write the proportion equation
   1,664.82 : 2,297.46 = 918.78 : x
2. Step 2: Convert to fraction form
   1,664.82/2,297.46 = 918.78/x
3. Step 3: Cross multiply
   1,664.82x = 2,297.46 × 918.78
4. Step 4: Simplify right side
   1,664.82x = 2,110,852.55
5. Step 5: Solve for x
   x = 2,110,852.55/1,664.82
6. Step 6: Final answer
   x = 1,267.92