Finding the Third Proportional to 57,698 and 87,630

Step by Step Solution

1. Step 1: Write the proportion equation
   57,698 : 87,630 = 87,630 : x
2. Step 2: Convert to fraction form
   57,698/87,630 = 87,630/x
3. Step 3: Cross multiply
   57,698x = 87,630 × 87,630
4. Step 4: Simplify right side
   57,698x = 7,679,016,900
5. Step 5: Solve for x
   x = 7,679,016,900/57,698
6. Step 6: Final answer
   x = 133,089.83