Finding the Fourth Proportional to 1,664.69, 2,297.40 and 918.71

Step by Step Solution

1. Step 1: Write the proportion equation
   1,664.69 : 2,297.40 = 918.71 : x
2. Step 2: Convert to fraction form
   1,664.69/2,297.40 = 918.71/x
3. Step 3: Cross multiply
   1,664.69x = 2,297.40 × 918.71
4. Step 4: Simplify right side
   1,664.69x = 2,110,639.76
5. Step 5: Solve for x
   x = 2,110,639.76/1,664.69
6. Step 6: Final answer
   x = 1,267.89