Finding the Third Proportional to 31,368 and 64,278

Step by Step Solution

1. Step 1: Write the proportion equation
   31,368 : 64,278 = 64,278 : x
2. Step 2: Convert to fraction form
   31,368/64,278 = 64,278/x
3. Step 3: Cross multiply
   31,368x = 64,278 × 64,278
4. Step 4: Simplify right side
   31,368x = 4,131,661,284
5. Step 5: Solve for x
   x = 4,131,661,284/31,368
6. Step 6: Final answer
   x = 131,715.80