Finding the Third Proportional to 19,742 and 42,328

Step by Step Solution

1. Step 1: Write the proportion equation
   19,742 : 42,328 = 42,328 : x
2. Step 2: Convert to fraction form
   19,742/42,328 = 42,328/x
3. Step 3: Cross multiply
   19,742x = 42,328 × 42,328
4. Step 4: Simplify right side
   19,742x = 1,791,659,584
5. Step 5: Solve for x
   x = 1,791,659,584/19,742
6. Step 6: Final answer
   x = 90,753.70