Finding the Third Proportional to 15,870 and 34,130

Step by Step Solution

1. Step 1: Write the proportion equation
   15,870 : 34,130 = 34,130 : x
2. Step 2: Convert to fraction form
   15,870/34,130 = 34,130/x
3. Step 3: Cross multiply
   15,870x = 34,130 × 34,130
4. Step 4: Simplify right side
   15,870x = 1,164,856,900
5. Step 5: Solve for x
   x = 1,164,856,900/15,870
6. Step 6: Final answer
   x = 73,399.93