Finding the Third Proportional to 28,698 and 60,870

Step by Step Solution

1. Step 1: Write the proportion equation
   28,698 : 60,870 = 60,870 : x
2. Step 2: Convert to fraction form
   28,698/60,870 = 60,870/x
3. Step 3: Cross multiply
   28,698x = 60,870 × 60,870
4. Step 4: Simplify right side
   28,698x = 3,705,156,900
5. Step 5: Solve for x
   x = 3,705,156,900/28,698
6. Step 6: Final answer
   x = 129,108.54