Finding the Fourth Proportional to 2,118.12, 2,923.22 and 1,186.62

Step by Step Solution

1. Step 1: Write the proportion equation
   2,118.12 : 2,923.22 = 1,186.62 : x
2. Step 2: Convert to fraction form
   2,118.12/2,923.22 = 1,186.62/x
3. Step 3: Cross multiply
   2,118.12x = 2,923.22 × 1,186.62
4. Step 4: Simplify right side
   2,118.12x = 3,468,751.32
5. Step 5: Solve for x
   x = 3,468,751.32/2,118.12
6. Step 6: Final answer
   x = 1,637.66