Finding the Third Proportional to 72,828 and 99,670

Step by Step Solution

1. Step 1: Write the proportion equation
   72,828 : 99,670 = 99,670 : x
2. Step 2: Convert to fraction form
   72,828/99,670 = 99,670/x
3. Step 3: Cross multiply
   72,828x = 99,670 × 99,670
4. Step 4: Simplify right side
   72,828x = 9,934,108,900
5. Step 5: Solve for x
   x = 9,934,108,900/72,828
6. Step 6: Final answer
   x = 136,405.08