Finding the Fourth Proportional to 2,218.89, 3,063.78 and 1,380.81

Step by Step Solution

1. Step 1: Write the proportion equation
   2,218.89 : 3,063.78 = 1,380.81 : x
2. Step 2: Convert to fraction form
   2,218.89/3,063.78 = 1,380.81/x
3. Step 3: Cross multiply
   2,218.89x = 3,063.78 × 1,380.81
4. Step 4: Simplify right side
   2,218.89x = 4,230,498.06
5. Step 5: Solve for x
   x = 4,230,498.06/2,218.89
6. Step 6: Final answer
   x = 1,906.58