Finding the Third Proportional to 9,390 and 19,931

Step by Step Solution

1. Step 1: Write the proportion equation
   9,390 : 19,931 = 19,931 : x
2. Step 2: Convert to fraction form
   9,390/19,931 = 19,931/x
3. Step 3: Cross multiply
   9,390x = 19,931 × 19,931
4. Step 4: Simplify right side
   9,390x = 397,244,761
5. Step 5: Solve for x
   x = 397,244,761/9,390
6. Step 6: Final answer
   x = 42,305.09