Finding the Third Proportional to 12,900 and 14,820

Step by Step Solution

1. Step 1: Write the proportion equation
   12,900 : 14,820 = 14,820 : x
2. Step 2: Convert to fraction form
   12,900/14,820 = 14,820/x
3. Step 3: Cross multiply
   12,900x = 14,820 × 14,820
4. Step 4: Simplify right side
   12,900x = 219,632,400
5. Step 5: Solve for x
   x = 219,632,400/12,900
6. Step 6: Final answer
   x = 17,025.77