Finding the Third Proportional to 11,889 and 28,116

Step by Step Solution

1. Step 1: Write the proportion equation
   11,889 : 28,116 = 28,116 : x
2. Step 2: Convert to fraction form
   11,889/28,116 = 28,116/x
3. Step 3: Cross multiply
   11,889x = 28,116 × 28,116
4. Step 4: Simplify right side
   11,889x = 790,509,456
5. Step 5: Solve for x
   x = 790,509,456/11,889
6. Step 6: Final answer
   x = 66,490.83