Finding the Third Proportional to 11,910 and 28,815

Step by Step Solution

1. Step 1: Write the proportion equation
   11,910 : 28,815 = 28,815 : x
2. Step 2: Convert to fraction form
   11,910/28,815 = 28,815/x
3. Step 3: Cross multiply
   11,910x = 28,815 × 28,815
4. Step 4: Simplify right side
   11,910x = 830,304,225
5. Step 5: Solve for x
   x = 830,304,225/11,910
6. Step 6: Final answer
   x = 69,714.88