Finding the Third Proportional to 13,688 and 21,948

Step by Step Solution

1. Step 1: Write the proportion equation
   13,688 : 21,948 = 21,948 : x
2. Step 2: Convert to fraction form
   13,688/21,948 = 21,948/x
3. Step 3: Cross multiply
   13,688x = 21,948 × 21,948
4. Step 4: Simplify right side
   13,688x = 481,714,704
5. Step 5: Solve for x
   x = 481,714,704/13,688
6. Step 6: Final answer
   x = 35,192.48