Finding the Third Proportional to 99,892.88 and 212,499.38

Step by Step Solution

1. Step 1: Write the proportion equation
   99,892.88 : 212,499.38 = 212,499.38 : x
2. Step 2: Convert to fraction form
   99,892.88/212,499.38 = 212,499.38/x
3. Step 3: Cross multiply
   99,892.88x = 212,499.38 × 212,499.38
4. Step 4: Simplify right side
   99,892.88x = 45,155,984,375.39
5. Step 5: Solve for x
   x = 45,155,984,375.39/99,892.88
6. Step 6: Final answer
   x = 452,044.10