Finding the Third Proportional to 143,810 and 309,692

Step by Step Solution

1. Step 1: Write the proportion equation
   143,810 : 309,692 = 309,692 : x
2. Step 2: Convert to fraction form
   143,810/309,692 = 309,692/x
3. Step 3: Cross multiply
   143,810x = 309,692 × 309,692
4. Step 4: Simplify right side
   143,810x = 95,909,134,864
5. Step 5: Solve for x
   x = 95,909,134,864/143,810
6. Step 6: Final answer
   x = 666,915.62