Finding the Fourth Proportional to 2,665.59, 3,678.30 and 1,603.53

Step by Step Solution

1. Step 1: Write the proportion equation
   2,665.59 : 3,678.30 = 1,603.53 : x
2. Step 2: Convert to fraction form
   2,665.59/3,678.30 = 1,603.53/x
3. Step 3: Cross multiply
   2,665.59x = 3,678.30 × 1,603.53
4. Step 4: Simplify right side
   2,665.59x = 5,898,264.40
5. Step 5: Solve for x
   x = 5,898,264.40/2,665.59
6. Step 6: Final answer
   x = 2,212.74