Finding the Third Proportional to 13,490 and 21,116

Step by Step Solution

1. Step 1: Write the proportion equation
   13,490 : 21,116 = 21,116 : x
2. Step 2: Convert to fraction form
   13,490/21,116 = 21,116/x
3. Step 3: Cross multiply
   13,490x = 21,116 × 21,116
4. Step 4: Simplify right side
   13,490x = 445,885,456
5. Step 5: Solve for x
   x = 445,885,456/13,490
6. Step 6: Final answer
   x = 33,053.04