Finding the Third Proportional to 42,699 and 72,795

Step by Step Solution

1. Step 1: Write the proportion equation
   42,699 : 72,795 = 72,795 : x
2. Step 2: Convert to fraction form
   42,699/72,795 = 72,795/x
3. Step 3: Cross multiply
   42,699x = 72,795 × 72,795
4. Step 4: Simplify right side
   42,699x = 5,299,112,025
5. Step 5: Solve for x
   x = 5,299,112,025/42,699
6. Step 6: Final answer
   x = 124,103.89