Finding the Fourth Proportional to 2,112.76, 2,915.52 and 1,228.49

Step by Step Solution

1. Step 1: Write the proportion equation
   2,112.76 : 2,915.52 = 1,228.49 : x
2. Step 2: Convert to fraction form
   2,112.76/2,915.52 = 1,228.49/x
3. Step 3: Cross multiply
   2,112.76x = 2,915.52 × 1,228.49
4. Step 4: Simplify right side
   2,112.76x = 3,581,687.16
5. Step 5: Solve for x
   x = 3,581,687.16/2,112.76
6. Step 6: Final answer
   x = 1,695.26