Finding the Fourth Proportional to 2,151.98, 3,228.24 and 2,118.62

Step by Step Solution

1. Step 1: Write the proportion equation
   2,151.98 : 3,228.24 = 2,118.62 : x
2. Step 2: Convert to fraction form
   2,151.98/3,228.24 = 2,118.62/x
3. Step 3: Cross multiply
   2,151.98x = 3,228.24 × 2,118.62
4. Step 4: Simplify right side
   2,151.98x = 6,839,413.83
5. Step 5: Solve for x
   x = 6,839,413.83/2,151.98
6. Step 6: Final answer
   x = 3,178.20