Finding the Third Proportional to 12,909.38 and 17,420.06

Step by Step Solution

1. Step 1: Write the proportion equation
   12,909.38 : 17,420.06 = 17,420.06 : x
2. Step 2: Convert to fraction form
   12,909.38/17,420.06 = 17,420.06/x
3. Step 3: Cross multiply
   12,909.38x = 17,420.06 × 17,420.06
4. Step 4: Simplify right side
   12,909.38x = 303,458,577.50
5. Step 5: Solve for x
   x = 303,458,577.50/12,909.38
6. Step 6: Final answer
   x = 23,506.84