Finding the Fourth Proportional to 3,123.81, 4,677.21 and 2,197.98

Step by Step Solution

1. Step 1: Write the proportion equation
   3,123.81 : 4,677.21 = 2,197.98 : x
2. Step 2: Convert to fraction form
   3,123.81/4,677.21 = 2,197.98/x
3. Step 3: Cross multiply
   3,123.81x = 4,677.21 × 2,197.98
4. Step 4: Simplify right side
   3,123.81x = 10,280,414.04
5. Step 5: Solve for x
   x = 10,280,414.04/3,123.81
6. Step 6: Final answer
   x = 3,290.99