Finding the Fourth Proportional to 2,109.08, 2,910.76 and 1,225.37

Step by Step Solution

1. Step 1: Write the proportion equation
   2,109.08 : 2,910.76 = 1,225.37 : x
2. Step 2: Convert to fraction form
   2,109.08/2,910.76 = 1,225.37/x
3. Step 3: Cross multiply
   2,109.08x = 2,910.76 × 1,225.37
4. Step 4: Simplify right side
   2,109.08x = 3,566,744.58
5. Step 5: Solve for x
   x = 3,566,744.58/2,109.08
6. Step 6: Final answer
   x = 1,691.14