Finding the Third Proportional to 31,808 and 68,860

Step by Step Solution

1. Step 1: Write the proportion equation
   31,808 : 68,860 = 68,860 : x
2. Step 2: Convert to fraction form
   31,808/68,860 = 68,860/x
3. Step 3: Cross multiply
   31,808x = 68,860 × 68,860
4. Step 4: Simplify right side
   31,808x = 4,741,699,600
5. Step 5: Solve for x
   x = 4,741,699,600/31,808
6. Step 6: Final answer
   x = 149,072.55