Finding the Third Proportional to 19,945 and 31,290

Step by Step Solution

1. Step 1: Write the proportion equation
   19,945 : 31,290 = 31,290 : x
2. Step 2: Convert to fraction form
   19,945/31,290 = 31,290/x
3. Step 3: Cross multiply
   19,945x = 31,290 × 31,290
4. Step 4: Simplify right side
   19,945x = 979,064,100
5. Step 5: Solve for x
   x = 979,064,100/19,945
6. Step 6: Final answer
   x = 49,088.20