Finding the Third Proportional to 35,318 and 70,231

Step by Step Solution

1. Step 1: Write the proportion equation
   35,318 : 70,231 = 70,231 : x
2. Step 2: Convert to fraction form
   35,318/70,231 = 70,231/x
3. Step 3: Cross multiply
   35,318x = 70,231 × 70,231
4. Step 4: Simplify right side
   35,318x = 4,932,393,361
5. Step 5: Solve for x
   x = 4,932,393,361/35,318
6. Step 6: Final answer
   x = 139,656.64