Finding the Fourth Proportional to 2,108.67, 2,910.39 and 1,224.42

Step by Step Solution

1. Step 1: Write the proportion equation
   2,108.67 : 2,910.39 = 1,224.42 : x
2. Step 2: Convert to fraction form
   2,108.67/2,910.39 = 1,224.42/x
3. Step 3: Cross multiply
   2,108.67x = 2,910.39 × 1,224.42
4. Step 4: Simplify right side
   2,108.67x = 3,563,539.72
5. Step 5: Solve for x
   x = 3,563,539.72/2,108.67
6. Step 6: Final answer
   x = 1,689.95