Finding the Third Proportional to 31,930 and 69,455

Step by Step Solution

1. Step 1: Write the proportion equation
   31,930 : 69,455 = 69,455 : x
2. Step 2: Convert to fraction form
   31,930/69,455 = 69,455/x
3. Step 3: Cross multiply
   31,930x = 69,455 × 69,455
4. Step 4: Simplify right side
   31,930x = 4,823,997,025
5. Step 5: Solve for x
   x = 4,823,997,025/31,930
6. Step 6: Final answer
   x = 151,080.40