Finding the Third Proportional to 143,870 and 308,476

Step by Step Solution

1. Step 1: Write the proportion equation
   143,870 : 308,476 = 308,476 : x
2. Step 2: Convert to fraction form
   143,870/308,476 = 308,476/x
3. Step 3: Cross multiply
   143,870x = 308,476 × 308,476
4. Step 4: Simplify right side
   143,870x = 95,157,442,576
5. Step 5: Solve for x
   x = 95,157,442,576/143,870
6. Step 6: Final answer
   x = 661,412.68