Finding the Fourth Proportional to 2,111.40, 2,913.78 and 1,227.24

Step by Step Solution

1. Step 1: Write the proportion equation
   2,111.40 : 2,913.78 = 1,227.24 : x
2. Step 2: Convert to fraction form
   2,111.40/2,913.78 = 1,227.24/x
3. Step 3: Cross multiply
   2,111.40x = 2,913.78 × 1,227.24
4. Step 4: Simplify right side
   2,111.40x = 3,575,907.37
5. Step 5: Solve for x
   x = 3,575,907.37/2,111.40
6. Step 6: Final answer
   x = 1,693.62