Finding the Third Proportional to 11,820 and 28,110

Step by Step Solution

1. Step 1: Write the proportion equation
   11,820 : 28,110 = 28,110 : x
2. Step 2: Convert to fraction form
   11,820/28,110 = 28,110/x
3. Step 3: Cross multiply
   11,820x = 28,110 × 28,110
4. Step 4: Simplify right side
   11,820x = 790,172,100
5. Step 5: Solve for x
   x = 790,172,100/11,820
6. Step 6: Final answer
   x = 66,850.43