Finding the Fourth Proportional to 2,109.33, 2,910.66 and 1,225.32

Step by Step Solution

1. Step 1: Write the proportion equation
   2,109.33 : 2,910.66 = 1,225.32 : x
2. Step 2: Convert to fraction form
   2,109.33/2,910.66 = 1,225.32/x
3. Step 3: Cross multiply
   2,109.33x = 2,910.66 × 1,225.32
4. Step 4: Simplify right side
   2,109.33x = 3,566,489.91
5. Step 5: Solve for x
   x = 3,566,489.91/2,109.33
6. Step 6: Final answer
   x = 1,690.82