Finding the Fourth Proportional to 2,109.32, 2,910 and 1,224.96

Step by Step Solution

1. Step 1: Write the proportion equation
   2,109.32 : 2,910 = 1,224.96 : x
2. Step 2: Convert to fraction form
   2,109.32/2,910 = 1,224.96/x
3. Step 3: Cross multiply
   2,109.32x = 2,910 × 1,224.96
4. Step 4: Simplify right side
   2,109.32x = 3,564,633.60
5. Step 5: Solve for x
   x = 3,564,633.60/2,109.32
6. Step 6: Final answer
   x = 1,689.94