Finding the Third Proportional to 99,346.50 and 212,897.25

Step by Step Solution

1. Step 1: Write the proportion equation
   99,346.50 : 212,897.25 = 212,897.25 : x
2. Step 2: Convert to fraction form
   99,346.50/212,897.25 = 212,897.25/x
3. Step 3: Cross multiply
   99,346.50x = 212,897.25 × 212,897.25
4. Step 4: Simplify right side
   99,346.50x = 45,325,239,057.56
5. Step 5: Solve for x
   x = 45,325,239,057.56/99,346.50
6. Step 6: Final answer
   x = 456,233.88