Finding the Fourth Proportional to 2,109.14, 2,911.23 and 1,225.34

Step by Step Solution

1. Step 1: Write the proportion equation
   2,109.14 : 2,911.23 = 1,225.34 : x
2. Step 2: Convert to fraction form
   2,109.14/2,911.23 = 1,225.34/x
3. Step 3: Cross multiply
   2,109.14x = 2,911.23 × 1,225.34
4. Step 4: Simplify right side
   2,109.14x = 3,567,246.57
5. Step 5: Solve for x
   x = 3,567,246.57/2,109.14
6. Step 6: Final answer
   x = 1,691.33