Finding the Third Proportional to 19,309 and 42,310

Step by Step Solution

1. Step 1: Write the proportion equation
   19,309 : 42,310 = 42,310 : x
2. Step 2: Convert to fraction form
   19,309/42,310 = 42,310/x
3. Step 3: Cross multiply
   19,309x = 42,310 × 42,310
4. Step 4: Simplify right side
   19,309x = 1,790,136,100
5. Step 5: Solve for x
   x = 1,790,136,100/19,309
6. Step 6: Final answer
   x = 92,709.93