Finding the Third Proportional to 1,636.45 and 2,431.90

Step by Step Solution

1. Step 1: Write the proportion equation
   1,636.45 : 2,431.90 = 2,431.90 : x
2. Step 2: Convert to fraction form
   1,636.45/2,431.90 = 2,431.90/x
3. Step 3: Cross multiply
   1,636.45x = 2,431.90 × 2,431.90
4. Step 4: Simplify right side
   1,636.45x = 5,914,130.01
5. Step 5: Solve for x
   x = 5,914,130.01/1,636.45
6. Step 6: Final answer
   x = 3,613.99