Finding the Third Proportional to 31,278 and 67,551

Step by Step Solution

1. Step 1: Write the proportion equation
   31,278 : 67,551 = 67,551 : x
2. Step 2: Convert to fraction form
   31,278/67,551 = 67,551/x
3. Step 3: Cross multiply
   31,278x = 67,551 × 67,551
4. Step 4: Simplify right side
   31,278x = 4,563,137,601
5. Step 5: Solve for x
   x = 4,563,137,601/31,278
6. Step 6: Final answer
   x = 145,889.69