Finding the Fourth Proportional to 2,111.37, 2,913.64 and 1,227.48

Step by Step Solution

1. Step 1: Write the proportion equation
   2,111.37 : 2,913.64 = 1,227.48 : x
2. Step 2: Convert to fraction form
   2,111.37/2,913.64 = 1,227.48/x
3. Step 3: Cross multiply
   2,111.37x = 2,913.64 × 1,227.48
4. Step 4: Simplify right side
   2,111.37x = 3,576,434.83
5. Step 5: Solve for x
   x = 3,576,434.83/2,111.37
6. Step 6: Final answer
   x = 1,693.89