Finding the Fourth Proportional to 2,007.18, 2,769.72 and 1,210.38

Step by Step Solution

1. Step 1: Write the proportion equation
   2,007.18 : 2,769.72 = 1,210.38 : x
2. Step 2: Convert to fraction form
   2,007.18/2,769.72 = 1,210.38/x
3. Step 3: Cross multiply
   2,007.18x = 2,769.72 × 1,210.38
4. Step 4: Simplify right side
   2,007.18x = 3,352,413.69
5. Step 5: Solve for x
   x = 3,352,413.69/2,007.18
6. Step 6: Final answer
   x = 1,670.21