Finding the Third Proportional to 143,040 and 310,662

Step by Step Solution

1. Step 1: Write the proportion equation
   143,040 : 310,662 = 310,662 : x
2. Step 2: Convert to fraction form
   143,040/310,662 = 310,662/x
3. Step 3: Cross multiply
   143,040x = 310,662 × 310,662
4. Step 4: Simplify right side
   143,040x = 96,510,878,244
5. Step 5: Solve for x
   x = 96,510,878,244/143,040
6. Step 6: Final answer
   x = 674,712.52