Finding the Third Proportional to 6,390.80 and 13,670.06

Step by Step Solution

1. Step 1: Write the proportion equation
   6,390.80 : 13,670.06 = 13,670.06 : x
2. Step 2: Convert to fraction form
   6,390.80/13,670.06 = 13,670.06/x
3. Step 3: Cross multiply
   6,390.80x = 13,670.06 × 13,670.06
4. Step 4: Simplify right side
   6,390.80x = 186,870,608.75
5. Step 5: Solve for x
   x = 186,870,608.75/6,390.80
6. Step 6: Final answer
   x = 29,240.58