Finding the Third Proportional to 238,136 and 323,410

Step by Step Solution

1. Step 1: Write the proportion equation
   238,136 : 323,410 = 323,410 : x
2. Step 2: Convert to fraction form
   238,136/323,410 = 323,410/x
3. Step 3: Cross multiply
   238,136x = 323,410 × 323,410
4. Step 4: Simplify right side
   238,136x = 104,594,028,100
5. Step 5: Solve for x
   x = 104,594,028,100/238,136
6. Step 6: Final answer
   x = 439,219.72