Finding the Third Proportional to 99,019 and 213,820.50

Step by Step Solution

1. Step 1: Write the proportion equation
   99,019 : 213,820.50 = 213,820.50 : x
2. Step 2: Convert to fraction form
   99,019/213,820.50 = 213,820.50/x
3. Step 3: Cross multiply
   99,019x = 213,820.50 × 213,820.50
4. Step 4: Simplify right side
   99,019x = 45,719,206,220.25
5. Step 5: Solve for x
   x = 45,719,206,220.25/99,019
6. Step 6: Final answer
   x = 461,721.55