Finding the Fourth Proportional to 2,109.43, 2,911.23 and 1,270.40

Step by Step Solution

1. Step 1: Write the proportion equation
   2,109.43 : 2,911.23 = 1,270.40 : x
2. Step 2: Convert to fraction form
   2,109.43/2,911.23 = 1,270.40/x
3. Step 3: Cross multiply
   2,109.43x = 2,911.23 × 1,270.40
4. Step 4: Simplify right side
   2,109.43x = 3,698,426.59
5. Step 5: Solve for x
   x = 3,698,426.59/2,109.43
6. Step 6: Final answer
   x = 1,753.29