Finding the Fourth Proportional to 2,109.83, 2,911.28 and 1,270.53

Step by Step Solution

1. Step 1: Write the proportion equation
   2,109.83 : 2,911.28 = 1,270.53 : x
2. Step 2: Convert to fraction form
   2,109.83/2,911.28 = 1,270.53/x
3. Step 3: Cross multiply
   2,109.83x = 2,911.28 × 1,270.53
4. Step 4: Simplify right side
   2,109.83x = 3,698,862.23
5. Step 5: Solve for x
   x = 3,698,862.23/2,109.83
6. Step 6: Final answer
   x = 1,753.16