Finding the Fourth Proportional to 2,111.61, 2,913.98 and 1,227.41

Step by Step Solution

1. Step 1: Write the proportion equation
   2,111.61 : 2,913.98 = 1,227.41 : x
2. Step 2: Convert to fraction form
   2,111.61/2,913.98 = 1,227.41/x
3. Step 3: Cross multiply
   2,111.61x = 2,913.98 × 1,227.41
4. Step 4: Simplify right side
   2,111.61x = 3,576,627.48
5. Step 5: Solve for x
   x = 3,576,627.48/2,111.61
6. Step 6: Final answer
   x = 1,693.79