Finding the Fourth Proportional to 3,291.89, 4,938.51 and 1,211.87

Step by Step Solution

1. Step 1: Write the proportion equation
   3,291.89 : 4,938.51 = 1,211.87 : x
2. Step 2: Convert to fraction form
   3,291.89/4,938.51 = 1,211.87/x
3. Step 3: Cross multiply
   3,291.89x = 4,938.51 × 1,211.87
4. Step 4: Simplify right side
   3,291.89x = 5,984,807.42
5. Step 5: Solve for x
   x = 5,984,807.42/3,291.89
6. Step 6: Final answer
   x = 1,818.05