Finding the Third Proportional to 9,300 and 19,858

Step by Step Solution

1. Step 1: Write the proportion equation
   9,300 : 19,858 = 19,858 : x
2. Step 2: Convert to fraction form
   9,300/19,858 = 19,858/x
3. Step 3: Cross multiply
   9,300x = 19,858 × 19,858
4. Step 4: Simplify right side
   9,300x = 394,340,164
5. Step 5: Solve for x
   x = 394,340,164/9,300
6. Step 6: Final answer
   x = 42,402.17