Finding the Third Proportional to 10,866 and 17,991

Step by Step Solution

1. Step 1: Write the proportion equation
   10,866 : 17,991 = 17,991 : x
2. Step 2: Convert to fraction form
   10,866/17,991 = 17,991/x
3. Step 3: Cross multiply
   10,866x = 17,991 × 17,991
4. Step 4: Simplify right side
   10,866x = 323,676,081
5. Step 5: Solve for x
   x = 323,676,081/10,866
6. Step 6: Final answer
   x = 29,787.97