Finding the Fourth Proportional to 2,118.42, 3,180.60 and 1,679.94

Step by Step Solution

1. Step 1: Write the proportion equation
   2,118.42 : 3,180.60 = 1,679.94 : x
2. Step 2: Convert to fraction form
   2,118.42/3,180.60 = 1,679.94/x
3. Step 3: Cross multiply
   2,118.42x = 3,180.60 × 1,679.94
4. Step 4: Simplify right side
   2,118.42x = 5,343,217.16
5. Step 5: Solve for x
   x = 5,343,217.16/2,118.42
6. Step 6: Final answer
   x = 2,522.27