Finding the Third Proportional to 31,868 and 70,172

Step by Step Solution

1. Step 1: Write the proportion equation
   31,868 : 70,172 = 70,172 : x
2. Step 2: Convert to fraction form
   31,868/70,172 = 70,172/x
3. Step 3: Cross multiply
   31,868x = 70,172 × 70,172
4. Step 4: Simplify right side
   31,868x = 4,924,109,584
5. Step 5: Solve for x
   x = 4,924,109,584/31,868
6. Step 6: Final answer
   x = 154,515.80