Finding the Third Proportional to 143,660 and 314,752

Step by Step Solution

1. Step 1: Write the proportion equation
   143,660 : 314,752 = 314,752 : x
2. Step 2: Convert to fraction form
   143,660/314,752 = 314,752/x
3. Step 3: Cross multiply
   143,660x = 314,752 × 314,752
4. Step 4: Simplify right side
   143,660x = 99,068,821,504
5. Step 5: Solve for x
   x = 99,068,821,504/143,660
6. Step 6: Final answer
   x = 689,606.16