Finding the Third Proportional to 143,683 and 314,118

Step by Step Solution

1. Step 1: Write the proportion equation
   143,683 : 314,118 = 314,118 : x
2. Step 2: Convert to fraction form
   143,683/314,118 = 314,118/x
3. Step 3: Cross multiply
   143,683x = 314,118 × 314,118
4. Step 4: Simplify right side
   143,683x = 98,670,117,924
5. Step 5: Solve for x
   x = 98,670,117,924/143,683
6. Step 6: Final answer
   x = 686,720.89