Finding the Third Proportional to 10,870 and 28,119

Step by Step Solution

1. Step 1: Write the proportion equation
   10,870 : 28,119 = 28,119 : x
2. Step 2: Convert to fraction form
   10,870/28,119 = 28,119/x
3. Step 3: Cross multiply
   10,870x = 28,119 × 28,119
4. Step 4: Simplify right side
   10,870x = 790,678,161
5. Step 5: Solve for x
   x = 790,678,161/10,870
6. Step 6: Final answer
   x = 72,739.48