Finding the Third Proportional to 21,157 and 31,080

Step by Step Solution

1. Step 1: Write the proportion equation
   21,157 : 31,080 = 31,080 : x
2. Step 2: Convert to fraction form
   21,157/31,080 = 31,080/x
3. Step 3: Cross multiply
   21,157x = 31,080 × 31,080
4. Step 4: Simplify right side
   21,157x = 965,966,400
5. Step 5: Solve for x
   x = 965,966,400/21,157
6. Step 6: Final answer
   x = 45,657.06