Finding the Third Proportional to 12,370 and 20,830

Step by Step Solution

1. Step 1: Write the proportion equation
   12,370 : 20,830 = 20,830 : x
2. Step 2: Convert to fraction form
   12,370/20,830 = 20,830/x
3. Step 3: Cross multiply
   12,370x = 20,830 × 20,830
4. Step 4: Simplify right side
   12,370x = 433,888,900
5. Step 5: Solve for x
   x = 433,888,900/12,370
6. Step 6: Final answer
   x = 35,075.90