Finding the Third Proportional to 143,674 and 314,100

Step by Step Solution

1. Step 1: Write the proportion equation
   143,674 : 314,100 = 314,100 : x
2. Step 2: Convert to fraction form
   143,674/314,100 = 314,100/x
3. Step 3: Cross multiply
   143,674x = 314,100 × 314,100
4. Step 4: Simplify right side
   143,674x = 98,658,810,000
5. Step 5: Solve for x
   x = 98,658,810,000/143,674
6. Step 6: Final answer
   x = 686,685.20