Finding the Third Proportional to 31,521 and 64,482

Step by Step Solution

1. Step 1: Write the proportion equation
   31,521 : 64,482 = 64,482 : x
2. Step 2: Convert to fraction form
   31,521/64,482 = 64,482/x
3. Step 3: Cross multiply
   31,521x = 64,482 × 64,482
4. Step 4: Simplify right side
   31,521x = 4,157,928,324
5. Step 5: Solve for x
   x = 4,157,928,324/31,521
6. Step 6: Final answer
   x = 131,909.78