Finding the Third Proportional to 21,116 and 31,485

Step by Step Solution

1. Step 1: Write the proportion equation
   21,116 : 31,485 = 31,485 : x
2. Step 2: Convert to fraction form
   21,116/31,485 = 31,485/x
3. Step 3: Cross multiply
   21,116x = 31,485 × 31,485
4. Step 4: Simplify right side
   21,116x = 991,305,225
5. Step 5: Solve for x
   x = 991,305,225/21,116
6. Step 6: Final answer
   x = 46,945.69