Finding the Fourth Proportional to 2,108.82, 2,910.48 and 1,224.45

Step by Step Solution

1. Step 1: Write the proportion equation
   2,108.82 : 2,910.48 = 1,224.45 : x
2. Step 2: Convert to fraction form
   2,108.82/2,910.48 = 1,224.45/x
3. Step 3: Cross multiply
   2,108.82x = 2,910.48 × 1,224.45
4. Step 4: Simplify right side
   2,108.82x = 3,563,739.53
5. Step 5: Solve for x
   x = 3,563,739.53/2,108.82
6. Step 6: Final answer
   x = 1,689.92