Finding the Fourth Proportional to 3,478.83, 5,211.30 and 2,091.42

Step by Step Solution

1. Step 1: Write the proportion equation
   3,478.83 : 5,211.30 = 2,091.42 : x
2. Step 2: Convert to fraction form
   3,478.83/5,211.30 = 2,091.42/x
3. Step 3: Cross multiply
   3,478.83x = 5,211.30 × 2,091.42
4. Step 4: Simplify right side
   3,478.83x = 10,899,017.05
5. Step 5: Solve for x
   x = 10,899,017.05/3,478.83
6. Step 6: Final answer
   x = 3,132.95