Finding the Fourth Proportional to 2,072.27, 2,859.89 and 1,188.02

Step by Step Solution

1. Step 1: Write the proportion equation
   2,072.27 : 2,859.89 = 1,188.02 : x
2. Step 2: Convert to fraction form
   2,072.27/2,859.89 = 1,188.02/x
3. Step 3: Cross multiply
   2,072.27x = 2,859.89 × 1,188.02
4. Step 4: Simplify right side
   2,072.27x = 3,397,586.28
5. Step 5: Solve for x
   x = 3,397,586.28/2,072.27
6. Step 6: Final answer
   x = 1,639.55