Finding the Third Proportional to 10,905 and 17,290.50

Step by Step Solution

1. Step 1: Write the proportion equation
   10,905 : 17,290.50 = 17,290.50 : x
2. Step 2: Convert to fraction form
   10,905/17,290.50 = 17,290.50/x
3. Step 3: Cross multiply
   10,905x = 17,290.50 × 17,290.50
4. Step 4: Simplify right side
   10,905x = 298,961,390.25
5. Step 5: Solve for x
   x = 298,961,390.25/10,905
6. Step 6: Final answer
   x = 27,415.07