Finding the Fourth Proportional to 2,112.93, 2,915.82 and 1,168.78

Step by Step Solution

1. Step 1: Write the proportion equation
   2,112.93 : 2,915.82 = 1,168.78 : x
2. Step 2: Convert to fraction form
   2,112.93/2,915.82 = 1,168.78/x
3. Step 3: Cross multiply
   2,112.93x = 2,915.82 × 1,168.78
4. Step 4: Simplify right side
   2,112.93x = 3,407,952.10
5. Step 5: Solve for x
   x = 3,407,952.10/2,112.93
6. Step 6: Final answer
   x = 1,612.90