Finding the Fourth Proportional to 2,111.64, 2,914.20 and 1,227.12

Step by Step Solution

1. Step 1: Write the proportion equation
   2,111.64 : 2,914.20 = 1,227.12 : x
2. Step 2: Convert to fraction form
   2,111.64/2,914.20 = 1,227.12/x
3. Step 3: Cross multiply
   2,111.64x = 2,914.20 × 1,227.12
4. Step 4: Simplify right side
   2,111.64x = 3,576,073.10
5. Step 5: Solve for x
   x = 3,576,073.10/2,111.64
6. Step 6: Final answer
   x = 1,693.51