Finding the Third Proportional to 31,172 and 67,528

Step by Step Solution

1. Step 1: Write the proportion equation
   31,172 : 67,528 = 67,528 : x
2. Step 2: Convert to fraction form
   31,172/67,528 = 67,528/x
3. Step 3: Cross multiply
   31,172x = 67,528 × 67,528
4. Step 4: Simplify right side
   31,172x = 4,560,030,784
5. Step 5: Solve for x
   x = 4,560,030,784/31,172
6. Step 6: Final answer
   x = 146,286.12