Finding the Fourth Proportional to 2,118.96, 3,176.82 and 1,636.20

Step by Step Solution

1. Step 1: Write the proportion equation
   2,118.96 : 3,176.82 = 1,636.20 : x
2. Step 2: Convert to fraction form
   2,118.96/3,176.82 = 1,636.20/x
3. Step 3: Cross multiply
   2,118.96x = 3,176.82 × 1,636.20
4. Step 4: Simplify right side
   2,118.96x = 5,197,912.88
5. Step 5: Solve for x
   x = 5,197,912.88/2,118.96
6. Step 6: Final answer
   x = 2,453.05