Finding the Third Proportional to 143,781 and 308,379

Step by Step Solution

1. Step 1: Write the proportion equation
   143,781 : 308,379 = 308,379 : x
2. Step 2: Convert to fraction form
   143,781/308,379 = 308,379/x
3. Step 3: Cross multiply
   143,781x = 308,379 × 308,379
4. Step 4: Simplify right side
   143,781x = 95,097,607,641
5. Step 5: Solve for x
   x = 95,097,607,641/143,781
6. Step 6: Final answer
   x = 661,405.94