Finding the Third Proportional to 31,276 and 68,630

Step by Step Solution

1. Step 1: Write the proportion equation
   31,276 : 68,630 = 68,630 : x
2. Step 2: Convert to fraction form
   31,276/68,630 = 68,630/x
3. Step 3: Cross multiply
   31,276x = 68,630 × 68,630
4. Step 4: Simplify right side
   31,276x = 4,710,076,900
5. Step 5: Solve for x
   x = 4,710,076,900/31,276
6. Step 6: Final answer
   x = 150,597.16