Finding the Third Proportional to 20,872 and 31,316

Step by Step Solution

1. Step 1: Write the proportion equation
   20,872 : 31,316 = 31,316 : x
2. Step 2: Convert to fraction form
   20,872/31,316 = 31,316/x
3. Step 3: Cross multiply
   20,872x = 31,316 × 31,316
4. Step 4: Simplify right side
   20,872x = 980,691,856
5. Step 5: Solve for x
   x = 980,691,856/20,872
6. Step 6: Final answer
   x = 46,986.00