Finding the Fourth Proportional to 2,112.45, 3,165.59 and 1,188.27

Step by Step Solution

1. Step 1: Write the proportion equation
   2,112.45 : 3,165.59 = 1,188.27 : x
2. Step 2: Convert to fraction form
   2,112.45/3,165.59 = 1,188.27/x
3. Step 3: Cross multiply
   2,112.45x = 3,165.59 × 1,188.27
4. Step 4: Simplify right side
   2,112.45x = 3,761,566.92
5. Step 5: Solve for x
   x = 3,761,566.92/2,112.45
6. Step 6: Final answer
   x = 1,780.67