Finding the Third Proportional to 19,620 and 42,369

Step by Step Solution

1. Step 1: Write the proportion equation
   19,620 : 42,369 = 42,369 : x
2. Step 2: Convert to fraction form
   19,620/42,369 = 42,369/x
3. Step 3: Cross multiply
   19,620x = 42,369 × 42,369
4. Step 4: Simplify right side
   19,620x = 1,795,132,161
5. Step 5: Solve for x
   x = 1,795,132,161/19,620
6. Step 6: Final answer
   x = 91,495.01