Finding the Fourth Proportional to 2,109.41, 2,911.07 and 1,225.17

Step by Step Solution

1. Step 1: Write the proportion equation
   2,109.41 : 2,911.07 = 1,225.17 : x
2. Step 2: Convert to fraction form
   2,109.41/2,911.07 = 1,225.17/x
3. Step 3: Cross multiply
   2,109.41x = 2,911.07 × 1,225.17
4. Step 4: Simplify right side
   2,109.41x = 3,566,561.71
5. Step 5: Solve for x
   x = 3,566,561.71/2,109.41
6. Step 6: Final answer
   x = 1,690.78