Finding the Fourth Proportional to 2,665.09, 3,678.74 and 1,603.45

Step by Step Solution

1. Step 1: Write the proportion equation
   2,665.09 : 3,678.74 = 1,603.45 : x
2. Step 2: Convert to fraction form
   2,665.09/3,678.74 = 1,603.45/x
3. Step 3: Cross multiply
   2,665.09x = 3,678.74 × 1,603.45
4. Step 4: Simplify right side
   2,665.09x = 5,898,664.45
5. Step 5: Solve for x
   x = 5,898,664.45/2,665.09
6. Step 6: Final answer
   x = 2,213.31