Finding the Third Proportional to 19,830 and 28,999

Step by Step Solution

1. Step 1: Write the proportion equation
   19,830 : 28,999 = 28,999 : x
2. Step 2: Convert to fraction form
   19,830/28,999 = 28,999/x
3. Step 3: Cross multiply
   19,830x = 28,999 × 28,999
4. Step 4: Simplify right side
   19,830x = 840,942,001
5. Step 5: Solve for x
   x = 840,942,001/19,830
6. Step 6: Final answer
   x = 42,407.56