Finding the Third Proportional to 21,807 and 31,931

Step by Step Solution

1. Step 1: Write the proportion equation
   21,807 : 31,931 = 31,931 : x
2. Step 2: Convert to fraction form
   21,807/31,931 = 31,931/x
3. Step 3: Cross multiply
   21,807x = 31,931 × 31,931
4. Step 4: Simplify right side
   21,807x = 1,019,588,761
5. Step 5: Solve for x
   x = 1,019,588,761/21,807
6. Step 6: Final answer
   x = 46,755.11