Finding the Fourth Proportional to 2,666.12, 3,678.81 and 1,603.62

Step by Step Solution

1. Step 1: Write the proportion equation
   2,666.12 : 3,678.81 = 1,603.62 : x
2. Step 2: Convert to fraction form
   2,666.12/3,678.81 = 1,603.62/x
3. Step 3: Cross multiply
   2,666.12x = 3,678.81 × 1,603.62
4. Step 4: Simplify right side
   2,666.12x = 5,899,413.29
5. Step 5: Solve for x
   x = 5,899,413.29/2,666.12
6. Step 6: Final answer
   x = 2,212.74