Finding the Third Proportional to 1,997.16 and 4,153.78

Step by Step Solution

1. Step 1: Write the proportion equation
   1,997.16 : 4,153.78 = 4,153.78 : x
2. Step 2: Convert to fraction form
   1,997.16/4,153.78 = 4,153.78/x
3. Step 3: Cross multiply
   1,997.16x = 4,153.78 × 4,153.78
4. Step 4: Simplify right side
   1,997.16x = 17,253,898.67
5. Step 5: Solve for x
   x = 17,253,898.67/1,997.16
6. Step 6: Final answer
   x = 8,639.23