Finding the Third Proportional to 31,392 and 64,971

Step by Step Solution

1. Step 1: Write the proportion equation
   31,392 : 64,971 = 64,971 : x
2. Step 2: Convert to fraction form
   31,392/64,971 = 64,971/x
3. Step 3: Cross multiply
   31,392x = 64,971 × 64,971
4. Step 4: Simplify right side
   31,392x = 4,221,230,841
5. Step 5: Solve for x
   x = 4,221,230,841/31,392
6. Step 6: Final answer
   x = 134,468.36