Finding the Third Proportional to 31,392 and 72,612

Step by Step Solution

1. Step 1: Write the proportion equation
   31,392 : 72,612 = 72,612 : x
2. Step 2: Convert to fraction form
   31,392/72,612 = 72,612/x
3. Step 3: Cross multiply
   31,392x = 72,612 × 72,612
4. Step 4: Simplify right side
   31,392x = 5,272,502,544
5. Step 5: Solve for x
   x = 5,272,502,544/31,392
6. Step 6: Final answer
   x = 167,956.89