Finding the Fourth Proportional to 2,072.58, 2,859.83 and 1,188.22

Step by Step Solution

1. Step 1: Write the proportion equation
   2,072.58 : 2,859.83 = 1,188.22 : x
2. Step 2: Convert to fraction form
   2,072.58/2,859.83 = 1,188.22/x
3. Step 3: Cross multiply
   2,072.58x = 2,859.83 × 1,188.22
4. Step 4: Simplify right side
   2,072.58x = 3,398,107.20
5. Step 5: Solve for x
   x = 3,398,107.20/2,072.58
6. Step 6: Final answer
   x = 1,639.55