Finding the Fourth Proportional to 2,418.50, 3,621.21 and 1,261.82

Step by Step Solution

1. Step 1: Write the proportion equation
   2,418.50 : 3,621.21 = 1,261.82 : x
2. Step 2: Convert to fraction form
   2,418.50/3,621.21 = 1,261.82/x
3. Step 3: Cross multiply
   2,418.50x = 3,621.21 × 1,261.82
4. Step 4: Simplify right side
   2,418.50x = 4,569,297.10
5. Step 5: Solve for x
   x = 4,569,297.10/2,418.50
6. Step 6: Final answer
   x = 1,889.31