Finding the Third Proportional to 31,881 and 67,557

Step by Step Solution

1. Step 1: Write the proportion equation
   31,881 : 67,557 = 67,557 : x
2. Step 2: Convert to fraction form
   31,881/67,557 = 67,557/x
3. Step 3: Cross multiply
   31,881x = 67,557 × 67,557
4. Step 4: Simplify right side
   31,881x = 4,563,948,249
5. Step 5: Solve for x
   x = 4,563,948,249/31,881
6. Step 6: Final answer
   x = 143,155.74