Finding the Fourth Proportional to 1,665.06, 2,297.70 and 918.89

Step by Step Solution

1. Step 1: Write the proportion equation
   1,665.06 : 2,297.70 = 918.89 : x
2. Step 2: Convert to fraction form
   1,665.06/2,297.70 = 918.89/x
3. Step 3: Cross multiply
   1,665.06x = 2,297.70 × 918.89
4. Step 4: Simplify right side
   1,665.06x = 2,111,322.06
5. Step 5: Solve for x
   x = 2,111,322.06/1,665.06
6. Step 6: Final answer
   x = 1,268.02