Finding the Fourth Proportional to 2,112.73, 2,915.61 and 1,168.58

Step by Step Solution

1. Step 1: Write the proportion equation
   2,112.73 : 2,915.61 = 1,168.58 : x
2. Step 2: Convert to fraction form
   2,112.73/2,915.61 = 1,168.58/x
3. Step 3: Cross multiply
   2,112.73x = 2,915.61 × 1,168.58
4. Step 4: Simplify right side
   2,112.73x = 3,407,123.53
5. Step 5: Solve for x
   x = 3,407,123.53/2,112.73
6. Step 6: Final answer
   x = 1,612.66