Finding the Fourth Proportional to 1,965.61, 2,711.55 and 1,168.57

Step by Step Solution

1. Step 1: Write the proportion equation
   1,965.61 : 2,711.55 = 1,168.57 : x
2. Step 2: Convert to fraction form
   1,965.61/2,711.55 = 1,168.57/x
3. Step 3: Cross multiply
   1,965.61x = 2,711.55 × 1,168.57
4. Step 4: Simplify right side
   1,965.61x = 3,168,622.43
5. Step 5: Solve for x
   x = 3,168,622.43/1,965.61
6. Step 6: Final answer
   x = 1,612.03