Finding the Fourth Proportional to 2,108.22, 2,909.24 and 1,211.34

Step by Step Solution

1. Step 1: Write the proportion equation
   2,108.22 : 2,909.24 = 1,211.34 : x
2. Step 2: Convert to fraction form
   2,108.22/2,909.24 = 1,211.34/x
3. Step 3: Cross multiply
   2,108.22x = 2,909.24 × 1,211.34
4. Step 4: Simplify right side
   2,108.22x = 3,524,072.72
5. Step 5: Solve for x
   x = 3,524,072.72/2,108.22
6. Step 6: Final answer
   x = 1,671.59