Finding the Third Proportional to 19,312 and 42,320

Step by Step Solution

1. Step 1: Write the proportion equation
   19,312 : 42,320 = 42,320 : x
2. Step 2: Convert to fraction form
   19,312/42,320 = 42,320/x
3. Step 3: Cross multiply
   19,312x = 42,320 × 42,320
4. Step 4: Simplify right side
   19,312x = 1,790,982,400
5. Step 5: Solve for x
   x = 1,790,982,400/19,312
6. Step 6: Final answer
   x = 92,739.35