Finding the Fourth Proportional to 2,665.65, 3,673.53 and 1,918.29

Step by Step Solution

1. Step 1: Write the proportion equation
   2,665.65 : 3,673.53 = 1,918.29 : x
2. Step 2: Convert to fraction form
   2,665.65/3,673.53 = 1,918.29/x
3. Step 3: Cross multiply
   2,665.65x = 3,673.53 × 1,918.29
4. Step 4: Simplify right side
   2,665.65x = 7,046,895.86
5. Step 5: Solve for x
   x = 7,046,895.86/2,665.65
6. Step 6: Final answer
   x = 2,643.59