Finding the Fourth Proportional to 2,112.77, 2,915.43 and 1,168.52

Step by Step Solution

1. Step 1: Write the proportion equation
   2,112.77 : 2,915.43 = 1,168.52 : x
2. Step 2: Convert to fraction form
   2,112.77/2,915.43 = 1,168.52/x
3. Step 3: Cross multiply
   2,112.77x = 2,915.43 × 1,168.52
4. Step 4: Simplify right side
   2,112.77x = 3,406,723.69
5. Step 5: Solve for x
   x = 3,406,723.69/2,112.77
6. Step 6: Final answer
   x = 1,612.45