Finding the Third Proportional to 30,985 and 67,910

Step by Step Solution

1. Step 1: Write the proportion equation
   30,985 : 67,910 = 67,910 : x
2. Step 2: Convert to fraction form
   30,985/67,910 = 67,910/x
3. Step 3: Cross multiply
   30,985x = 67,910 × 67,910
4. Step 4: Simplify right side
   30,985x = 4,611,768,100
5. Step 5: Solve for x
   x = 4,611,768,100/30,985
6. Step 6: Final answer
   x = 148,838.73