Finding the Fourth Proportional to 2,112.59, 2,915.31 and 1,168.37

Step by Step Solution

1. Step 1: Write the proportion equation
   2,112.59 : 2,915.31 = 1,168.37 : x
2. Step 2: Convert to fraction form
   2,112.59/2,915.31 = 1,168.37/x
3. Step 3: Cross multiply
   2,112.59x = 2,915.31 × 1,168.37
4. Step 4: Simplify right side
   2,112.59x = 3,406,154.91
5. Step 5: Solve for x
   x = 3,406,154.91/2,112.59
6. Step 6: Final answer
   x = 1,612.31