Finding the Third Proportional to 103,995.50 and 212,918

Step by Step Solution

1. Step 1: Write the proportion equation
   103,995.50 : 212,918 = 212,918 : x
2. Step 2: Convert to fraction form
   103,995.50/212,918 = 212,918/x
3. Step 3: Cross multiply
   103,995.50x = 212,918 × 212,918
4. Step 4: Simplify right side
   103,995.50x = 45,334,074,724
5. Step 5: Solve for x
   x = 45,334,074,724/103,995.50
6. Step 6: Final answer
   x = 435,923.43