Finding the Third Proportional to 143,685 and 314,122

Step by Step Solution

1. Step 1: Write the proportion equation
   143,685 : 314,122 = 314,122 : x
2. Step 2: Convert to fraction form
   143,685/314,122 = 314,122/x
3. Step 3: Cross multiply
   143,685x = 314,122 × 314,122
4. Step 4: Simplify right side
   143,685x = 98,672,630,884
5. Step 5: Solve for x
   x = 98,672,630,884/143,685
6. Step 6: Final answer
   x = 686,728.82