Finding the Fourth Proportional to 2,109.34, 2,910.25 and 1,224.97

Step by Step Solution

1. Step 1: Write the proportion equation
   2,109.34 : 2,910.25 = 1,224.97 : x
2. Step 2: Convert to fraction form
   2,109.34/2,910.25 = 1,224.97/x
3. Step 3: Cross multiply
   2,109.34x = 2,910.25 × 1,224.97
4. Step 4: Simplify right side
   2,109.34x = 3,564,983.01
5. Step 5: Solve for x
   x = 3,564,983.01/2,109.34
6. Step 6: Final answer
   x = 1,690.09