Finding the Third Proportional to 31,470 and 64,392

Step by Step Solution

1. Step 1: Write the proportion equation
   31,470 : 64,392 = 64,392 : x
2. Step 2: Convert to fraction form
   31,470/64,392 = 64,392/x
3. Step 3: Cross multiply
   31,470x = 64,392 × 64,392
4. Step 4: Simplify right side
   31,470x = 4,146,329,664
5. Step 5: Solve for x
   x = 4,146,329,664/31,470
6. Step 6: Final answer
   x = 131,754.99