Finding the Third Proportional to 99,017.38 and 213,817.50

Step by Step Solution

1. Step 1: Write the proportion equation
   99,017.38 : 213,817.50 = 213,817.50 : x
2. Step 2: Convert to fraction form
   99,017.38/213,817.50 = 213,817.50/x
3. Step 3: Cross multiply
   99,017.38x = 213,817.50 × 213,817.50
4. Step 4: Simplify right side
   99,017.38x = 45,717,923,306.25
5. Step 5: Solve for x
   x = 45,717,923,306.25/99,017.38
6. Step 6: Final answer
   x = 461,716.17