Finding the Third Proportional to 31,395 and 69,108

Step by Step Solution

1. Step 1: Write the proportion equation
   31,395 : 69,108 = 69,108 : x
2. Step 2: Convert to fraction form
   31,395/69,108 = 69,108/x
3. Step 3: Cross multiply
   31,395x = 69,108 × 69,108
4. Step 4: Simplify right side
   31,395x = 4,775,915,664
5. Step 5: Solve for x
   x = 4,775,915,664/31,395
6. Step 6: Final answer
   x = 152,123.45