Finding the Fourth Proportional to 2,111.77, 2,913.75 and 1,227.42

Step by Step Solution

1. Step 1: Write the proportion equation
   2,111.77 : 2,913.75 = 1,227.42 : x
2. Step 2: Convert to fraction form
   2,111.77/2,913.75 = 1,227.42/x
3. Step 3: Cross multiply
   2,111.77x = 2,913.75 × 1,227.42
4. Step 4: Simplify right side
   2,111.77x = 3,576,395.03
5. Step 5: Solve for x
   x = 3,576,395.03/2,111.77
6. Step 6: Final answer
   x = 1,693.55