Finding the Third Proportional to 151,213.50 and 320,328

Step by Step Solution

1. Step 1: Write the proportion equation
   151,213.50 : 320,328 = 320,328 : x
2. Step 2: Convert to fraction form
   151,213.50/320,328 = 320,328/x
3. Step 3: Cross multiply
   151,213.50x = 320,328 × 320,328
4. Step 4: Simplify right side
   151,213.50x = 102,610,027,584
5. Step 5: Solve for x
   x = 102,610,027,584/151,213.50
6. Step 6: Final answer
   x = 678,577.16