Finding the Third Proportional to 19,836 and 30,120

Step by Step Solution

1. Step 1: Write the proportion equation
   19,836 : 30,120 = 30,120 : x
2. Step 2: Convert to fraction form
   19,836/30,120 = 30,120/x
3. Step 3: Cross multiply
   19,836x = 30,120 × 30,120
4. Step 4: Simplify right side
   19,836x = 907,214,400
5. Step 5: Solve for x
   x = 907,214,400/19,836
6. Step 6: Final answer
   x = 45,735.75