Finding the Third Proportional to 19,400 and 42,160

Step by Step Solution

1. Step 1: Write the proportion equation
   19,400 : 42,160 = 42,160 : x
2. Step 2: Convert to fraction form
   19,400/42,160 = 42,160/x
3. Step 3: Cross multiply
   19,400x = 42,160 × 42,160
4. Step 4: Simplify right side
   19,400x = 1,777,465,600
5. Step 5: Solve for x
   x = 1,777,465,600/19,400
6. Step 6: Final answer
   x = 91,621.94