Finding the Third Proportional to 143,556 and 314,460

Step by Step Solution

1. Step 1: Write the proportion equation
   143,556 : 314,460 = 314,460 : x
2. Step 2: Convert to fraction form
   143,556/314,460 = 314,460/x
3. Step 3: Cross multiply
   143,556x = 314,460 × 314,460
4. Step 4: Simplify right side
   143,556x = 98,885,091,600
5. Step 5: Solve for x
   x = 98,885,091,600/143,556
6. Step 6: Final answer
   x = 688,825.90