Finding the Fourth Proportional to 2,388.98, 3,577.82 and 1,216.10

Step by Step Solution

1. Step 1: Write the proportion equation
   2,388.98 : 3,577.82 = 1,216.10 : x
2. Step 2: Convert to fraction form
   2,388.98/3,577.82 = 1,216.10/x
3. Step 3: Cross multiply
   2,388.98x = 3,577.82 × 1,216.10
4. Step 4: Simplify right side
   2,388.98x = 4,350,986.90
5. Step 5: Solve for x
   x = 4,350,986.90/2,388.98
6. Step 6: Final answer
   x = 1,821.27