Finding the Third Proportional to 99,604 and 215,812

Step by Step Solution

1. Step 1: Write the proportion equation
   99,604 : 215,812 = 215,812 : x
2. Step 2: Convert to fraction form
   99,604/215,812 = 215,812/x
3. Step 3: Cross multiply
   99,604x = 215,812 × 215,812
4. Step 4: Simplify right side
   99,604x = 46,574,819,344
5. Step 5: Solve for x
   x = 46,574,819,344/99,604
6. Step 6: Final answer
   x = 467,599.89