Finding the Third Proportional to 143,885 and 316,323

Step by Step Solution

1. Step 1: Write the proportion equation
   143,885 : 316,323 = 316,323 : x
2. Step 2: Convert to fraction form
   143,885/316,323 = 316,323/x
3. Step 3: Cross multiply
   143,885x = 316,323 × 316,323
4. Step 4: Simplify right side
   143,885x = 100,060,240,329
5. Step 5: Solve for x
   x = 100,060,240,329/143,885
6. Step 6: Final answer
   x = 695,418.15