Finding the Third Proportional to 21,186 and 31,130

Step by Step Solution

1. Step 1: Write the proportion equation
   21,186 : 31,130 = 31,130 : x
2. Step 2: Convert to fraction form
   21,186/31,130 = 31,130/x
3. Step 3: Cross multiply
   21,186x = 31,130 × 31,130
4. Step 4: Simplify right side
   21,186x = 969,076,900
5. Step 5: Solve for x
   x = 969,076,900/21,186
6. Step 6: Final answer
   x = 45,741.38