Finding the Third Proportional to 99,018.28 and 213,819.33

Step by Step Solution

1. Step 1: Write the proportion equation
   99,018.28 : 213,819.33 = 213,819.33 : x
2. Step 2: Convert to fraction form
   99,018.28/213,819.33 = 213,819.33/x
3. Step 3: Cross multiply
   99,018.28x = 213,819.33 × 213,819.33
4. Step 4: Simplify right side
   99,018.28x = 45,718,705,079.83
5. Step 5: Solve for x
   x = 45,718,705,079.83/99,018.28
6. Step 6: Final answer
   x = 461,719.84