Finding the Fourth Proportional to 2,108.34, 2,909.04 and 1,224.12

Step by Step Solution

1. Step 1: Write the proportion equation
   2,108.34 : 2,909.04 = 1,224.12 : x
2. Step 2: Convert to fraction form
   2,108.34/2,909.04 = 1,224.12/x
3. Step 3: Cross multiply
   2,108.34x = 2,909.04 × 1,224.12
4. Step 4: Simplify right side
   2,108.34x = 3,561,014.04
5. Step 5: Solve for x
   x = 3,561,014.04/2,108.34
6. Step 6: Final answer
   x = 1,689.01