Finding the Fourth Proportional to 2,538.18, 3,809.82 and 2,196.90

Step by Step Solution

1. Step 1: Write the proportion equation
   2,538.18 : 3,809.82 = 2,196.90 : x
2. Step 2: Convert to fraction form
   2,538.18/3,809.82 = 2,196.90/x
3. Step 3: Cross multiply
   2,538.18x = 3,809.82 × 2,196.90
4. Step 4: Simplify right side
   2,538.18x = 8,369,793.56
5. Step 5: Solve for x
   x = 8,369,793.56/2,538.18
6. Step 6: Final answer
   x = 3,297.56