Finding the Third Proportional to 215,424 and 328,968

Step by Step Solution

1. Step 1: Write the proportion equation
   215,424 : 328,968 = 328,968 : x
2. Step 2: Convert to fraction form
   215,424/328,968 = 328,968/x
3. Step 3: Cross multiply
   215,424x = 328,968 × 328,968
4. Step 4: Simplify right side
   215,424x = 108,219,945,024
5. Step 5: Solve for x
   x = 108,219,945,024/215,424
6. Step 6: Final answer
   x = 502,357.89