Finding the Fourth Proportional to 2,412.65, 3,616.17 and 1,111.38

Step by Step Solution

1. Step 1: Write the proportion equation
   2,412.65 : 3,616.17 = 1,111.38 : x
2. Step 2: Convert to fraction form
   2,412.65/3,616.17 = 1,111.38/x
3. Step 3: Cross multiply
   2,412.65x = 3,616.17 × 1,111.38
4. Step 4: Simplify right side
   2,412.65x = 4,018,939.01
5. Step 5: Solve for x
   x = 4,018,939.01/2,412.65
6. Step 6: Final answer
   x = 1,665.78