Finding the Third Proportional to 99,173 and 218,034

Step by Step Solution

1. Step 1: Write the proportion equation
   99,173 : 218,034 = 218,034 : x
2. Step 2: Convert to fraction form
   99,173/218,034 = 218,034/x
3. Step 3: Cross multiply
   99,173x = 218,034 × 218,034
4. Step 4: Simplify right side
   99,173x = 47,538,825,156
5. Step 5: Solve for x
   x = 47,538,825,156/99,173
6. Step 6: Final answer
   x = 479,352.50