Finding the Third Proportional to 19,821.50 and 30,360

Step by Step Solution

1. Step 1: Write the proportion equation
   19,821.50 : 30,360 = 30,360 : x
2. Step 2: Convert to fraction form
   19,821.50/30,360 = 30,360/x
3. Step 3: Cross multiply
   19,821.50x = 30,360 × 30,360
4. Step 4: Simplify right side
   19,821.50x = 921,729,600
5. Step 5: Solve for x
   x = 921,729,600/19,821.50
6. Step 6: Final answer
   x = 46,501.51